Plastics cover, completely enclosed, without screws, requires no earth grounding.
全塑外壳， 完全密封， 无外加螺钉， 无需接地线路。
Created entirely of biodegradable corrugated cardboard (without screws and wedges) in "special employment centres" where labourers surely whistle while they work, the chair sounded so promising.
这种被设计成完全可生物降解的瓦楞纸板(没有螺丝和楔子)椅子，听起来是蛮有前途的。设计是在“特殊职业中心”完成的，在那里想必有很多工人一边吹着口哨一边工作。
Blades without clips are held by screws and the clamp on the handle.
失去金属夹的刀片由螺丝和手柄上的夹子固定。
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