检查靠近外墙的所有管路，并在管路和墙体之间包覆玻璃钢保温层或石棉，以确保低温远离管路。

Check any pipes that run close to outside walls. Put some fiberglass insulation or rockwool between the pipe and the wall to help keep the cold away from the pipe.

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石棉纤维的表面覆盖有一层铁或钙，这就是为什么用铁染色时石棉纤维经常被称为“含铁小体”。

The asbestos fiber becomes coated with iron and calcium, which is why it is often referred to as a "ferruginous body" as seen here with an iron stain.

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连端硫化金属法兰，外有石棉保护层。

With sulfuration metal flange and asbestos covering layer.

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