触头
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... Ceramic Cup 瓷嘴 Contact Tip 导电嘴 Lighters & Flints 点火器和电石 ...
ball contact tip 球测头
Ag contact tip 银接点
alloy tip contact 合金触片
Welding current is transferred to the wire through the contact tip whose bore is slightly greater than the wire diameter.
焊接电流通过孔径稍大于焊丝直径的接触端传送到焊丝。
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Another helpful tip: be familiar with each reporter you contact.
FORBES: How NOT to Write a Pitch Letter
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