bearing bearing of pile
桩的承载力
聚对苯二甲酸乙二醇酯(PET)
聚对苯二甲酸乙二醇酯
sucker rod string rod column
ratio of diameter of labyrinth passage to diameter of particle
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