outer jacket meaning in English

外护层

Test method for voltage withstand of outer jacket
外部套管的耐压试验方法
Optical fiber coating loose tube , fill in fiber compound , strengthened steel wire in the middle , tube gasket around steel wire as se intertwist , cable fiber fill in cable core , and then coating water blocking tape , double - faced pe outer jacket . best se intertwist protect optical fiber away from drawing and press
光纤被覆松套管，纤膏填充，金属加强件置于缆芯中心，束管围绕钢丝作sz层绞，缆芯内充缆膏，外纵包阻水带，双面涂塑钢带粘结pe护套。