而且他们不保温，除非他们用化学工业品喷涂表面。

And none could be insulated unless they were sprayed or coated with an industrial chemical.

youdao

而且他们不保温，除非他们用化学工业品喷涂表面。

And none could be insulated unless they were sprayed or coated with an industrial chemical.

youdao