He serves a six-year apprenticeship in the steel work.

他在钢铁厂，当了六年学徒。

He serves a six - year apprenticeship in the steel work.

他在钢铁厂,当了六年学徒.

The spidery steel-work of gallery above gallery faded away in all directions into the dark.

一层层蜘蛛网样的钢架长廊从各个方面往黑暗里模糊了去。

Line the plastic mold with holes, (bamboo, wood or stainless steel work too) with long cotton muslin.

取个带孔木制容器（塑料或不锈钢都可以）铺上纱布。