把铁丝拉紧，别让它扭成结。
Keep the wire stretched tight don't let it kink.
轻型滑车双滑轮或单滑轮轻型滑车，用于升起或拉紧支撑船桅和帆的全部绳索
A light tackle having double or single blocks, used to hoist or tighten rigging.
负载过重会把绳子拉紧到崩断的地步。
Too heavy a load will strain the rope to its breaking point.
