短语词组短语Thick -wall glass pipe 厚壁玻璃管thick -wall red copper pipe 厚壁紫铜管nonmetal thick -wall pressure pipe 非金属厚壁压力管large stainless -steel thick-wall pipe 不锈钢大口径厚壁管small -diameter and thick-wall pipe 小口径厚壁管 返回 thick wall pipe