tightening

tightening bolt

[化] 紧固螺栓

tightening indicator

[化] 张紧指示器

tightening of credit

[经] 紧缩信贷

tightening pulley

[机] 皮带紧轮

tightening rails

[化] 张紧滑轨

tightening scale dial

[化] 张紧器刻度盘

tightening screw

[化] 紧固螺钉