Tach
abbr. 环节（tache）；转速计（tachometer）
🗣️ 情景例句
What's wrong?
怎么了？
I hope you're enjoying your stay here.
我希望你在这里过得愉快。
so every so often a sample is obtained with a coring bit.
因此时常要用取芯钻头取样。