Lashes trap debris and dirt, preventing it from coming in contact with our eyes, which could cause injuries.
睫毛能够阻止灰尘及异物进入眼睛，从而损伤眼睛。
The trap mechanism should be inspected periodically and all dirt removed from working parts. Worn parts must be replaced.
应该定期检查疏水阀的使用功能，所有污垢都应该从工作部件上清除。用旧的部件必须更换。
Accumulated dirt and sludge can be removed by "blowing down" through the drain in the bottom of trap.
通过疏水阀底部的排放阀可以清除累积的污垢和淤泥。
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