The waterproof skin on the outside of some of them may also BE of copper sheet, tarred felt or steel.

其中某些外部防水层也可由铜皮、油毡或钢板制成。

youdao

The door is barred with stout wooden poles and the windows are boarded with planks and protruding nails, but great gashes have been clawed in the tarred felt cladding the walls.

虽然屋门已经被坚固的木条挡住，窗户也钉上了带有突出钉子的木板，但是油毡覆盖的墙上被爪子抓出了大大的裂缝，附近的雪地上也留有爪印。

youdao

After two nights in the one-horse town of San - one tarred road, one half-decent hotel, no supermarket, lots of dust - I felt I deserved some good luck.

BBC: Mopti - 'Venice of Mali' in a war zone