一种新型的消声器能应用在高温、含尘的条件下。
A new kind of silencer used in conditions where there is heat and dust.
高性能的防护等级电机标准配置为IP55防护等级，可以用于含尘的或潮湿的环境中。
High degrees of protection All the motors are designed for IP55. They are suitable for dusty or humid surroundings.
如果你的房子曾经刷过含铅的油漆，并且漆层还比较好，最好的方法是用新的不含铅的油漆覆盖旧的漆层，而不是去除老的含铅的漆层，因为这样做，铅尘反而排放到空气当中了。
If your old house has lead paint in good condition, cover it with fresh paint rather than removing it, which releases lead dust into the air.
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