大口径桩
large-diameter datum pile
large-caliber pile
大口径透镜
large-diameter lens
large aperture lenses
aperture lens
appraisal indicator system
大口径钢管
large diameter steel pipeline
Steel Pipe with Large Caliber
pipe
大口径焊管
large-diameter welded pipe
大口径管材
large diameter pipe
large caliber pipe
large caliber winding pipe
大口径低转速泵
pump with large-diameter and low speed
大口径抽水
Large-diameter well pumping