clean the stones with brushes 用刷子清洗石头
They use hand sanitizers between customers, always use a fresh thread, and regularly clean brow brushes and scissors with antibacterial germicides.
他们在客户间使用消毒剂擦手，并且总是使用新的棉线，眉刷和剪刀也定时用抗菌清洗剂清洗。
If you start to notice that you're breaking out (especially in the cheek area), it may be time to clean your brushes.
如果你发现自己开始长痘痘(特别是两腮)，也许是时候清洁粉刷了。
Special wire brushes designed to clean tube ends may be used, but they should be carefully used so that an excessive amount of metal will not be removed from the tube.
可能可以使用特殊的金属丝刷来清理管道端口，但是使用时要小心，避免过量的金属无法从管道中清除出来。
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