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
2-grade deceleration straight-tooth gear box
2K-H differential gear trains
2K-H type epicyclic gear trains
2-Stage Star Gear Train
Ⅱ compound gear rotator pump
4-axis CNC spiral bevel gear machine
a new type of oscillating tooth gear transmission
absorber of landing gear
AC metal closing switch gear