cap p nut锁紧螺母;螺盖
Choke plug cap and nut风堵盖及螺母
upper cap nut[机] 上螺母
rod cap nut连杆盖螺母
Bonnet Cap Nut阀盖罩螺母
female cap nut螺母
HEX DOMED CAP NUT盖型螺母
regulating valve cap nut调节阀螺母