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電路板的布線、焊接技巧及注意事項

電路板的布線、焊接技巧及注意事項

發布日期:2019/4/18 16:11:36

PCBBUXIANJIQIAO

大发彩票官网1、 SHURUDUANYUSHUCHUDUANDEBIANXIANYINGBIMIANXIANGLINPINGXING, YIMIANCHANSHENGFANSHEGANRAO。BIYAOSHIYINGJIADIXIANGELI,LIANGXIANGLINCENGDEBUXIANYAOHUXIANGCHUIZHI,PINGXINGRONGYICHANSHENGJISHENGOUHE。

2、DIANYUAN、DIXIANZHIJIANJIASHANGQUOUDIANRONG。JINLIANGJIAKUANDIANYUAN、DIXIANKUANDU,HAOSHIDIXIANBIDIANYUANXIANKUAN,TAMENDEGUANXISHI:DIXIAN>DIANYUANXIAN>XINHAOXIAN,TONGCHANGXINHAOXIANKUANWEI:0.2~0.3mm,JINGXIKUANDUKEDA0.05~0.07mm,DIANYUANXIANWEI1.2~2.5mm

大发彩票官网3、 SHUZIDIANLUYUMONIDIANLUDEGONGDICHULI,SHUZIDIANLUDEPINLVGAO,MONIDIANLUDEMINGANDUQIANG,DUIXINHAOXIANLAISHUO,GAOPINDEXINHAOXIANJINKENENGYUANLIMINGANDEMONIDIANLUQIJIAN,DUIDIXIANLAISHUO,ZHENGGEPCBDUIWAIJIEZHIYOUYIGEJIEDIAN,SUOYIBIXUZAIPCBNEIBUJINXINGCHULISHU、MOGONGDIDEWENTI,ERZAIBANNEIBUSHUZIDIHEMONIDISHIJISHANGSHIFENKAIDETAMENZHIJIANHUBUXIANGLIAN,ZHISHIZAIPCBYUWAIJIELIANJIEDEJIEKOUCHU(RUCHATOUDENG)。SHUZIDIYUMONIDIYOUYIDIANDUANJIE,QINGZHUYI,ZHIYOUYIGELIANJIEDIAN。YEYOUZAIPCBSHANGBUGONGDIDE,ZHEYOUXITONGSHEJILAIJUEDING。

大发彩票官网4、JINKENENGSUODUANGAOPINYUANQIJIANZHIJIANDELIANXIAN,SHEFAJIANSHAOTAMENDEFENBUCANSHUHEXIANGHUJIANDEDIANCIGANRAO。YISHOUGANRAODEYUANQIJIANBUNENGXIANGHUAIDETAIJIN,SHURUHESHUCHUYUANJIANYINGJINLIANGYUANLI。MOUXIEYUANQIJIANHUODAOXIANZHIJIANKENENGYOUJIAOGAODEDIANWEICHA,YINGJIADATAMENZHIJIANDEJULI,YIMIANFANGDIANYINCHUYIWAIDUANLU。DAIGAODIANYADEYUANQIJIANYINGJINLIANGBUZHIZAIDIAOSHISHISHOUBUYICHUJIDEDIFANG。

大发彩票官网5、ZAIGAOPINXIAGONGZUODEDIANLU,YAOKAOLVYUANQIJIANZHIJIANDEFENBUCANSHU。YIBANDIANLUYINGJINKENENGSHIYUANQIJIANPINGXINGPAILIE。ZHEYANG,BUDANMEIGUAN.ERQIEZHUANGHANRONGYI.YIYUPILIANGSHENGCHAN。

6、SHURUSHUCHUDUANYONGDEDAOXIANYINGJINLIANGBIMIANXIANGLINPINGXING。HAOJIAXIANJIANDIXIAN,YIMIANFASHENGFANKUIOUHE。

7、YINZHIDAOXIANGUAIWANCHUYIBANQUYUANHUXING,ERZHIJIAOHUOJIAJIAOZAIGAOPINDIANLUZHONGHUIYINGXIANGDIANQIXINGNENG。RUFEIYAOQUZHIJIAO,YIBANCAIYONGLIANGGE135DUJIAOLAIDAITIZHIJIAO。

8、DIANYUANXIANSHEJI

GENJUYINZHIXIANLUBANDIANLIUDEDAXIAO,JINLIANGJIAZUDIANYUANXIANKUANDU,JIANSHAOHUANLUDIANZU。TONGSHI、SHIDIANYUANXIAN、DIXIANDEZOUXIANGHESHUJUCHUANDIDEFANGXIANGYIZHI,ZHEYANGYOUZHUYUZENGQIANGKANGZAOSHENGNENGLI。

9、DIXIANSHEJI

DIXIANSHEJIDEYUANZESHI:

(1)SHUZIDIYUMONIDIFENKAI。RUOXIANLUBANSHANGJIYOULUOJIDIANLUYOUYOUXIANXINGDIANLU,YINGSHITAMENJINLIANGFENKAI。DIPINDIANLUDEDIYINGJINLIANGCAIYONGDANDIANBINGLIANJIEDI,SHIJIBUXIANYOUKUNNANSHIKEBUFENCHUANLIANHOUZAIBINGLIANJIEDI。GAOPINDIANLUYICAIYONGDUODIANCHUANLIANJIEDI,DIXIANYINGDUANERZU,GAOPINYUANJIANZHOUWEIJINLIANGYONGZHAGEZHUANGDAMIANJIDIBO。

大发彩票官网(2)JIEDIXIANYINGJINLIANGJIACU。RUOJIEDIXIANYONGHENRENDEXIANTIAO,ZEJIEDIDIANWEISUIDIANLIUDEBIANHUAERBIANHUA,SHIKANGZAOXINGNENGJIANGDI。YINCIYINGJIANGJIEDIXIANJIACU,SHITANENGTONGGUOSANBEIYUYINZHIBANSHANGDEYUNXUDIANLIU。RUYOUKENENG,JIEDIXIANYINGZAI2~3mmYISHANG。

(3)JIEDIXIANGOUCHENGBIHUANLU。ZHIYOUSHUZIDIANLUZUCHENGDEYINZHIBAN,QIJIEDIDIANLUBUCHENGTUANHUANLUDADUONENGTIGAOKANGZAOSHENGNENGLI。

10、TUIOUDIANRONGPEIZHI

大发彩票官网PCBSHEJIDECHANGGUIZUOFAZHIYISHIZAIYINZHIBANDEGEGEGUANJIANBUWEIPEIZHISHIDANGDETUIOUDIANRONG。

TUIOUDIANRONGDEYIBANPEIZHIYUANZESHI:

大发彩票官网(1)DIANYUANSHURUDUANKUAJIE10 ~100ufDEDIANJIEDIANRONGQI。RUYOUKENENG,JIE100uFYISHANGDEGENGHAO。

(2)YUANZESHANGMEIGEJICHENGDIANLUXINPIANDOUYINGBUZHIYIGE0.01pFDECIPIANDIANRONG,RUYUYINZHIBANKONGXIBUGOU,KEMEI4~8GEXINPIANBUZHIYIGE1 ~ 10pFDEDANDIANRONG。

(3)DUIYUKANGZAONENGLIRUO、GUANDUANSHIDIANYUANBIANHUADADEQIJIAN,RU RAM、ROMCUNCHUQIJIAN,YINGZAIXINPIANDEDIANYUANXIANHEDIXIANZHIJIANZHIJIEJIERUTUIOUDIANRONG。

(4)DIANRONGYINXIANBUNENGTAICHANG,YOUQISHIGAOPINPANGLUDIANRONGBUNENGYOUYINXIAN。

大发彩票官网11、 CIWAI,HUANYINGZHUYIYIXIALIANGDIAN:

(1)ZAIYINZHIBANZHONGYOUJIECHUQI、JIDIANQI、ANNIUDENGYUANJIANSHI.CAOZUOTAMENSHIJUNHUICHANSHENGJIAODAHUOHUAFANGDIAN,BIXUCAIYONGFUTUSUOSHIDE RC DIANLULAIXISHOUFANGDIANDIANLIU。YIBAN R QU 1 ~ 2K,CQU2.2 ~ 47UF。

大发彩票官网(2)CMOSDESHURUZUKANGHENGAO,QIEYISHOUGANYING,YINCIZAISHIYONGSHIDUIBUYONGDUANYAOJIEDIHUOJIEZHENGDIANYUAN

HANJIEYUANLIJIHANJIEGONGJU

YI、HANJIEYUANLI

MUQIANDIANZIYUANQIJIANDEHANJIEZHUYAOCAIYONGXIHANJISHU。XIHANJISHUCAIYONGYIXIWEIZHUDEXIHEJINCAILIAOZUOHANLIAO,ZAIYIDINGWENDUXIAHANXIRONGHUA,JINSHUHANJIANYUXIYUANZIZHIJIANXIANGHUXIYIN、KUOSAN、JIEHE,XINGCHENGJINRUNDEJIEHECENG。WAIBIAOKANLAIYINSHUABANTONGBOJIYUANQIJIANYINXIANDOUSHIHENGUANGHUADE,SHIJISHANGTAMENDEBIAOMIANDOUYOUHENDUOWEIXIAODEAOTUJIANXI,RONGLIUTAIDEXIHANLIAOJIEZHUYUMAOXIGUANXILIYANHANJIANBIAOMIANKUOSAN,XINGCHENGHANLIAOYUHANJIANDEJINRUN,BAYUANQIJIANYUYINSHUABANLAOGUDIZHANHEZAIYIQI,ERQIEJUYOULIANGHAODEDAODIANXINGNENG。

大发彩票官网XIHANJIEDETIAOJIANSHI:HANJIANBIAOMIANYINGSHIQINGJIEDE,YOUGOU、XIUBANDOUHUIYINGXIANGHANJIE;NENGBEIXIHANLIAORUNSHIDEJINSHUCAIJUYOUKEHANXING,DUIHUANGTONGDENGBIAOMIANYIYUSHENGCHENGYANGHUAMODECAILIAO,KEYIJIEZHUYUZHUHANJI,XIANDUIHANJIANBIAOMIANJINXINGDUXIJINRUNHOU,ZAIXINGHANJIE;YAOYOUSHIDANGDEJIAREWENDU,SHIHANXILIAOJUYOUYIDINGDELIUDONGXING,CAIKEYIDADAOHANLAODEMUDE,DANWENDUYEBUKEGUOGAO,GUOGAOSHIRONGYIXINGCHENGYANGHUAMOERYINGXIANGHANJIEZHILIANG。

ER、DIANLUOTIE

SHOUGONGHANJIEDEZHUYAOGONGJUSHIDIANLUOTIE。DIANLUOTIEDEZHONGLEIHENDUO,YOUZHIRESHI、GANYINGSHI、CHUNENGSHIJIDIAOWENSHIDUOZHONG,DIANGONGLVYOU15W、2OW、35w……300WDUOZHONG,ZHUYAOGENJUHANJIANDAXIAOLAIJUEDING。YIBANYUANQIJIANDEHANJIEYI2OWNEIRESHIDIANLUOTIEWEIYI;HANJIEJICHENGDIANLUJIYISUNYUANQIJIANSHIKEYICAIYONGCHUNENGSHIDIANLUOTIE;HANJIEDAHANJIANSHIKEYONG150W~300WDAGONGLVWAIRESHIDIANLUOTIE。XIAOGONGLVDIANLUOTIEDELUOTIETOUWENDUYIBANZAI300~400℃ZHIJIAN。

大发彩票官网LUOTIETOUYIBANCAIYONGZITONGCAILIAOZHIZAO。WEIBAOHUZAIHANJIEDEGAOWENTIAOJIANXIABUBEIYANGHUASHENGXIU,CHANGJIANGLUOTIETOUJINGDIANDUCHULI,YOUDELUOTIETOUHUANCAIYONGBUYIYANGHUADEHEJINCAILIAOZHICHENG。XINDELUOTIETOUZAIZHENGSHIHANJIEQIANYINGXINGDUXICHULI。FANGFASHIJIANGLUOTIETOUYONGXISHAZHIDAMOGANJING,RANHOUJINRUSONGXIANGSHUI,ZHANSHANGHANXIZAIYINGWU(LIRUMUBAN)SHANGFANFUYANMO,SHILUOTIETOUGEGEMIANQUANBUDUXI。RUOSHIYONGSHIJIANHENCHANG,LUOTIETOUYIJINGYANGHUASHI,YAOYONGXIAOCUODAOQINGCUOQUBIAOMIANYANGHUACENG,ZAILUCHUZITONGDEGUANGLIANGHOUYONGTONGXINLUOTIETOUDUXIDEFANGFAYIYANGJINXINGCHULI。DANGJINSHIYONGYIBADIANLUOTIESHI,KEYILIYONGLUOTIETOUCHARENLUOTIEXINSHENQIANBUTONGDEFANGFADIAOJIELUOTIETOUDEWENDU。LUOTIETOUCONGLUOTIEXINLACHUDEYUECHANG,LUOTIETOUDEWENDUXIANGDUIYUEDI,FANZHIWENDUJIUYUEGAO。YEKEYILIYONGGENGHUANLUOTIETOUDEDAXIAOJIXINGZHUANGLAIDADAODIAOJIELUOTIETOUWENDUDEMUDE。LUOTIETOUYUEXI,WENDUYUEGAO;LUOTIETOUYUECU,XIANGDUIWENDUYUEDI。

GENJUSUOHANYUANJIANZHONGLEIKEYIXUANZESHIDANGXINGZHUANGDELUOTIETOU。LUOTIETOUDEDINGDUANXINGZHUANGYOUYUANZHUIXING、XIEMIANTUOYUANXINGJIZAOXINGDENGDUOZHONG。HANXIAOHANDIANKEYICAIYONGYUANZHUIXINGDE,HANJIAODAHANDIANKEYICAIYONGZAOXINGHUOYUANZHUXINGDE。

HUANYOUYIZHONGXIXIDIANLUOTIE,SHIZAIZHIRESHIDIANLUOTIESHANGZENGJIALEXIXIJIGOUGOUCHENGDE。ZAIDIANLUZHONGDUIYUANQIJIANCHAIHANSHIYAOYONGDAOZHEZHONGDIANLUOTIE

SAN、HANXIYUHANJI

HANXISHIHANJIEDEZHUYAOYONGLIAO。HANJIEDIANZIYUANQIJIANDEHANXISHIJISHANGSHIYIZHONGXIQIANHEJIN,BUTONGDEXIQIANBILIHANXIDERONGDIANWENDUBUTONG,YIBANWEI180~230 ℃。SHOUGONGHANJIEZHONGSHIHESHIYONGDESHIGUANZHUANGHANXISI,HANXISIZHONGJIANJIAYOUYOUZHISONGXIANGYUHUOHUAJI,SHIYONGQILAIYICHANGFANGBIAN。GUANZHUANGHANXISIYOU0.5、0.8、1.0、1.5…DENGDUOZHONGGUIGE,KEYIFANGBIANDIXUANYONG。

HANJIYOUCHENGZHUHANJI,SHIYIZHONGZAISHOUREHOUNENGDUISHIHANJINSHUBIAOMIANQIQINGJIEJIBAOHUZUOYONGDECAILIAO。KONGQIZHONGDEJINSHUBIAOMIANHENRONGYISHENGCHENGYANGHUAMO,ZHEZHONGYANGHUAMONENGZUZHIHANXIDUIHANJIEJINSHUDEJINRUNZUOYONG。SHIDANGDISHIYONGZHUHANJIKEYIQUCHUYANGHUAMO,SHIHANJIEZHILIANGGENGKEKAO,HANDIANBIAOMIANGENGGUANGHUA、YUANRUN。

大发彩票官网HANJIYOUWUJIXILIE、YOUJIXILIEHESONGXIANGXILIESANZHONG,QIZHONGWUJIHANJIHUOXINGQIANG,DANDUIJINSHUYOUQIANGFUSHIZUOYONG,DIANZIYUANQIJIANDEHANJIEZHONGBUYUNXUSHIYONG。YOUJIHANJI(LIRUERYIJIAO)HUOXINGCIZHI,YEYOUQINGDUFUSHIXING。YINGYONGGUANGFANDESHISONGXIANGZHUHANJI。JIANGSONGXIANGRONGYUJIUJING(1:3)XINGCHENG"SONGXIANGSHUI",HANJIESHIZAIHANDIANCHUZHANYISHAOLIANGSONGXIANGSHUI,JIUKEYIDADAOLIANGHAODEZHUHANXIAOGUO。YONGLIANGGUODUOHUODUOCIHANJIE,XINGCHENGHEIMOSHI,SONGXIANGYISHIQUZHUHANZUOYONG,XUQINGLIGANJINGHOUZAIXINGHANJIE。DUIYUYONGSONGXIANGHANJINANYUHANJIEDEJINSHUYUANQIJIAN,KEYITIANJIA4%ZUOYOUDEERYIJIAOHUOSANYICHUNJIAO(6%)。ZHIYUSHICHANGSHANGXIAOSHOUDEGEZHONGZHUHANJI,YIDINGYAOLEJIEQICHENGFENHEDUIYUANQIJIANDEFUSHIZUOYONGHOU,ZAIXINGSHIYONG。QIEWUMANGMUSHIYONG,YIZHIRIHOUZAOCHENGDUIYUANQIJIANDEFUSHI,QIHOUHUANWUQIONG。

SHOUGONGHANJIE

YI、SHOUGONGHANJIEFANGFA

SHOUGONGHANJIESHICHUANTONGDEHANJIEFANGFA,SUIRANPILIANGDIANZICHANPINSHENGCHANYIJIAOSHAOCAIYONGSHOUGONGHANJIELE,DANDUIDIANZICHANPINDEWEIXIU、DIAOSHIZHONGBUKEBIMIANDIHUANHUIYONGDAOSHOUGONGHANJIE。HANJIEZHILIANGDEHAOHUAIYEZHIJIEYINGXIANGDAOWEIXIUXIAOGUO。SHOUGONGHANJIESHIYIXIANGSHIJIANXINGHENQIANGDEJINENG,ZAILEJIEYIBANFANGFAHOU,YAODUOLIAN;DUOSHIJIAN,CAINENGYOUJIAOHAODEHANJIEZHILIANG。

大发彩票官网SHOUGONGHANJIEWODIANLUOTIEDEFANGFA,YOUZHENGWO、FANWOJIWOBISHISANZHONG。HANJIEYUANQIJIANJIWEIXIUDIANLUBANSHIYIWOBISHIJIAOWEIFANGBIAN。

SHOUGONGHANJIEYIBANFENSIBUZOUJINXING。①ZHUNBEIHANJIE:QINGJIEBEIHANYUANJIANCHUDEJICHENJIYOUWU,ZAIJIANGBEIHANYUANQIJIANZHOUWEIDEYUANQIJIANZUOYOUBAIYIBAI,RANGDIANLUOTIETOUKEYICHUDAOBEIHANYUANQIJIANDEHANXICHU,YIMIANLUOTIETOUSHENXIANGHANJIECHUSHITANGHUAIQITAYUANQIJIAN。HANJIEXINDEYUANQIJIANSHI,YINGDUIYUANQIJIANDEYINXIANDUXI。②JIAREHANJIE:JIANGZHANYOUSHAOXUHANXIHESONGXIANGDEDIANLUOTIETOUJIECHUBEIHANYUANQIJIANYUEJIMIAOZHONG。RUOSHIYAOCHAIXIAYINSHUABANSHANGDEYUANQIJIAN,ZEDAILUOTIETOUJIAREHOU,YONGSHOUHUOYINZIQINGQINGLADONGYUANQIJIAN,KANSHIFOUKEYIQUXIA。③QINGLIHANJIEMIAN:RUOSUOHANBUWEIHANXIGUODUO,KEJIANGLUOTIETOUSHANGDEHANXISHUAIDIAO(ZHUYIBUYAOTANGSHANGPIFU,YEBUYAOSHUAIDAOYINSHUADIANLUBANSHANG!),YONGGUANGLUOXITOU"ZHAN"XIEHANXICHULAI。RUOHANDIANHANXIGUOSHAO、BUYUANHUASHI,KEYIYONGDIANLUOTIETOU"ZHAN"XIEHANXIDUIHANDIANJINXINGBUHAN。④JIANCHAHANDIAN:KANHANDIANSHIFOUYUANRUN、GUANGLIANG、LAOGU,SHIFOUYOUYUZHOUWEIYUANQIJIANLIANHANDEXIANXIANG。

ER、HANJIEZHILIANGBUGAODEYUANYIN

SHOUGONGHANJIEDUIHANDIANDEYAOQIUSHI:①DIANLIANJIEXINGNENGLIANGHAO;②YOUYIDINGDEJIXIEQIANGDU;③GUANGHUAYUANRUN。

ZAOCHENGHANJIEZHILIANGBUGAODECHANGJIANYUANYINSHI:①HANXIYONGLIANGGUODUO,XINGCHENGHANDIANDEXIDUIJI;HANXIGUOSHAO,BUZUYIBAOGUOHANDIAN。②LENGHAN。HANJIESHILUOTIEWENDUGUODIHUOJIARESHIJIANBUZU,HANXIWEIWANQUANRONGHUA、JINRUN、HANXIBIAOMIANBUGUANGLIANG(BUGUANGHUA),YOUXIXIAOLIEWEN(RUTONGYIYANG!)。③JIASONGXIANGHANJIE,HANXIYUYUANQIJIANHUOYINSHUABANZHIJIANJIAZAZHUYICENGSONGXIANG,ZAOCHENGDIANLIANJIE。RUOJIAZAJIAREBUZUDESONGXIANG,ZEHANDIANXIAYOUYICENGHUANGHESESONGXIANGMO;RUOJIAREWENDUTAIGAO,ZEHANDIANXIAYOUYICENGTANHUASONGXIANGDEHEISEMO。DUIYUYOUJIAREBUZUDESONGXIANGMODEQINGKUANG,KEYIYONGLUOTIEJINXINGBUHAN。DUIYUYIXINGCHENGHEIMODE,ZEYAO"CHI"JINGHANXI,QINGJIEBEIHANYUANQIJIANHUOYINSHUABANBIAOMIAN,ZHONGXINJINXINGHANJIECAIXING。④HANXILIANQIAO。ZHIHANXILIANGGUODUO,ZAOCHENGYUANQIJIANDEHANDIANZHIJIANDUANLU。ZHEZAIDUICHAOXIAOYUANQIJIANJIXIXIAOYINSHUADIANLUBANJINXINGHANJIESHIYAOYOUWEIZHUYI。⑤HANJIGUOLIANG,HANDIANZHOUWEISONGXIANGCANZHAHENDUO。DANGSHAOLIANGSONGXIANGCANLIUSHI,KEYIYONGDIANLUOTIEZAIQINGQINGJIAREYIXIA,RANGSONGXIANGHUIFADIAO,YEKEYIYONGZHANYOUWUSHUIJIUJINGDEMIANQIU,CAQUDUOYUDESONGXIANGHUOHANJI。⑥HANDIANBIAOMIANDEHANXIXINGCHENGJIANRUIDETUJIAN。ZHEDUOSHIYOUYUJIAREWENDUBUZUHUOHANJIGUOSHAO,YIJILUOTIELIKAIHANDIANSHIJIAODUBUDANGZAOCHENGDE。

SAN、YISUNYUANQIJIANDEHANJIE

YISUNYUANQIJIANSHIZHIZAIANZHUANGHANJIEGUOCHENGZHONG,SHOUREHUOJIECHUDIANLUOTIESHIRONGYIZAOCHENGSUNHUAIDEYUANQIJIAN,LIRU,YOUJIZHUSUYUANQIJIAN、MOSJICHENGDIANLUDENG。YISUNYUANQIJIANZAIHANJIEQIANYAORENZHENZUOHAOBIAOMIANQINGJIE、DUXIDENGZHUNBEIGONGZUO,HANJIESHIQIEJICHANGSHIJIANFANFUTANGHAN,LUOTIETOUJILUOTIEWENDUYAOXUANZESHIDANG,QUEBAOYICIHANJIECHENGGONG。CIWAI,YAOSHAOYONGHANJI,FANGZHIHANJIQINRENYUANQIJIANDEDIANJIECHUDIAN(LIRUJIDIANQIDECHUDIAN)。HANJIEMOSJICHENGDIANLUHAOSHIYONGCHUNENGSHIDIANLUOTIE,YIFANGZHIYOUYUDIANLUOTIEDEWEIRUOLOUDIANERSUNHUAIJICHENGDIANLU。YOUYUJICHENGDIANLUYINXIANJIANJUHENXIAO,YAOXUANZEHESHIDELUOTIETOUJIWENDU,FANGZHIYINXIANJIANLIANXI。HANJIEJICHENGDIANLUHAOXIANHANJIEDIDUAN、SHUCHUDUAN、DIANYUANDUAN,ZAIHANSHURUDUAN。DUIYUNEIXIEDUIWENDUTEBIEMINGANDEYUANQIJIAN,KEYIYONGNIEZIJIASHANGZHANYOUYUANSHUIYICHUN(JIUJING)DEMIANQIUBAOHUYUANQIJIANGENBU,SHIRELIANGJINLIANGSHAOCHUANDAOYUANQIJIANSHANG。


文章關鍵詞:深圳pcb設備配件生產廠家
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拉菲彩票 拉菲彩票 贵州快3 贵州快3 陕西11选5 甘肃11选5 新疆11选5 新疆11选5