频繁的弯曲 meaning in English

repeated flexure

Ethylene - propylene rubber insulated high - voltage shielded soft cable with cold - resistant sheath working condition for soft rubber mine cable is difficult , experiencing frequent curve smash of stone and coal pressure of different machine detonable gas , its structure has following features
矿用橡软电缆的工作条件十分苛刻，它在使用中要经受频繁的弯曲，矸石和煤块的冲砸，各种机械的刮碰和挤压，以及矿井中有易爆的瓦斯气体，因此矿用电缆的结构有如下特点：