久久久久久久精品成人热小说,亚洲 欧美 激情 小说 另类,亚洲精品国产精华液,激烈 痉挛 抽搐 潮喷 MP4

News

Instructions for using horseshoe shaped soldering iron tips

Release Date:2017-07-19
Instructions for using horseshoe shaped soldering iron tips
The tip of the horseshoe shaped soldering iron has enough heat to melt the welding material of the metal.
For most printed circuit boards, all components need to be placed on the printed side (which we call the top of the board), and then we need to solder the solder pads on the bottom of all boards. The printed circuit board needs to be reversed in order to solder two pads.
The electric soldering iron is heated enough to melt the metal. This means that the soldering iron tip will quickly oxidize after overheating, which means it will oxidize and become dirty when exposed to air! Oxide is insulating, so in order to conduct heat well and perform welding work well, we need to remove the oxide on the soldering iron tip before each welding.
Remember to clean the soldering iron tip like this before each soldering process, as it oxidizes quickly! Only when the soldering iron tip shines like polished silver can you do a good soldering job.
Hold the soldering iron with your usual hand, just like holding a pencil.
Use a clean soldering iron tip to simultaneously touch the solder pad and the wire of the component you want to solder. Leave it there for 1 second to let everything heat up smoothly.
Then add 1mm-3mm solder under the soldering iron tip. The solder that does not touch the soldering head will not melt. Once it touches the soldering head, that is, when it melts, you can add the required solder of 1mm-3mm. Keep the soldering head on the solder pad and wire for an additional 1 second. Pay attention to the rapid cooling and hardening of the solder. This only takes about 1 second. Then you can proceed with the next welding.
展開
少妇高潮毛片免费看| 人妻互换免费中文字幕| 无码人妻熟妇AV又粗又大| 掀起岳裙子从后面挺进去日本电影 | 特级毛片爽WWW免费版| 久久中文字幕人妻熟av女蜜柚m| 漂亮人妻洗澡被公强 日日躁| 人妻互换免费中文字幕| 污调教贱乳打屁股扒开作文| 亚洲日产乱码一二三区别 | 乱操| 久久久久久久精品免费久精品蜜桃| 一本一道久久综合狠狠老| 老板把我抱到办公室揉我胸视频| 久久精品中文骚妇内射| WWW.色五月| 一本色道久久88加勒比—综合| 网禁拗女在稀缺视频网站| 國產麻豆av愛豆mad| 人人妻人人爽人人做夜欢视频九色 | 杨门女将之浪荡合集| 亚亚洲精品黑人巨大在线播放| 艳鉧动漫1~6全集在线观看 | 欧产日产国色天香区别视频| 奇米777狠狠色噜噜狠狠狠 | 97人妻人人做人碰人人爽| 免费无码国产欧美久久18| 日日碰狠狠躁久久躁少妇熟女人妻| 狠狠人妻久久久久久综合| 久久人人爽爽爽人久久久| 少妇人妻偷人精品无码视频| 丫头放松点别夹那么紧| 我和闺蜜在ktv被八人伦| 日本久久久久久久做爰片日本| 真人性囗交69视频| 久久99精品久久久久久水蜜桃| 日韩亚洲AV人人夜夜澡人人爽| 最近中文字幕完整在线看一 | 丫鬟露出双乳让老爷玩弄| 中文字字幕在线中文乱码怎么设置 | 国产精品亚洲专区无码牛牛|