小口径直缝焊接钢管
Small-sized straight welded pipe
小直径薄壁不锈钢焊管
Small－ sized light－ wall stainless steel weld tube
小直径厚壁钢管
Small-sized heavy-wall steel tube
T91小径钢管的焊接
Welding of T91 Small-bore Steel Pipes
不锈钢小径管
small-diameter stainless steel tube
小直径管道
small diameter pipeline
small diameter pipe
Pipes with small diameters
小直径管供热系统
small bore heating system
小直径管坯
Small-sized billet for tube-making
大直径钢管
Big diameter pipe
large diameter long acrossed-river water supply pipe
Large-sized steel tube
Heavy-caliber
大直径钢管桩
large－ diameter steel pipe pile
多头小直径
multi-head and diminutive diameter
多头小直径深层搅拌防渗墙施工工法
Construction Method of Multi-headed and Small-radius Deep Stir
construction method of multi-headed and small-radi
多头小直径深层搅拌桩
multi-drill small-diameter deep-layer mixing pile
高效小直径深孔钻削系统
high efficiency drilling system for small and deep hole