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
adjustable swivel chair
back swivel sliver guide
center-hung swivel window
double passage swivel joint
double tube double swivel barrel
double tube single swivel barrel
high-speed railway swivel bridge
horizontal swivel method