The waterproof skin on the outside of some of them may also BE of copper sheet, tarredfelt or steel.
其中某些外部防水层也可由铜皮、油毡或钢板制成。
2
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 tarredfelt cladding the walls.