When choosing collets and collet bodies, you need to consider two main factors.夹头及夹头机构在选择, 你需要考虑两个主要因素....

collets的音标：collets的英式发音音标为：[kɒ'lɪts]collets的美式发音音标为：[kɒ'lɪts]...

绝缘块...