顶盖必须用焦油纸或塑料封闭.The pit cover should be sealed over with tar paper or plastic.扭扣可以用骨头 、 木头 、 玻璃或塑料制成.A button can be made of bone, wood, glass, or plastic.配金属烙铁座 ( 936A ) 或塑料烙铁座 ( 936C ) 及高温海棉.A sponge with a metal stand (...