helical rod packing machine
automatic gland packing
packing gland
盘根压盖
衬垫压盖
填料压盖
密封衬垫
充填材料
填料函盖
填密函盖
孔口封闭器
sucker rod string rod column
dermal gland ducts dermal gland
1 000 kV composite rod insulator
1 100 kV rod post porcelain insulator
10B33 cold heading wire rod
1-complete set Connecting Rod Bearings
3-piece bogie with cross-braced rod
500kV rod composite string insulator