The allergic and dark skin of sycosis also can have peace of mind the usage.

过敏及暗疮性皮安心使用。

4 All removable internals shall be checked by suitable methods to ensure their insertability and removability through the manhole.

所有拆除内件均需使用适当的方法进以确保其通过人孔的嵌入性及拆除性。