Handdrill
手持式凿岩机
🗣️ 情景例句
Let's talk.
我们谈谈吧。
She is supposed to be one of the best singers.
大家认为她是最有名气的歌星。
below 20 per cent, its bactericidal action is negligible.
浓度低于20％时，杀菌能力基本上就不存在了。