grooved pipe base 带沟槽的中心管
perforated pipe base 带眼中心管
pipe base perforating 中心管打眼
full weld-on pipe base screen 带中心管的全焊接筛管
Steel pipe column base 钢管柱基础
The forging hot pipe comprises a base pipe, an upper cover, a working medium and an elastic sealing unit.
该锻造式热管包含一基管、一上盖、一工作流体及一具弹性密封体。
The utility model relates to a pneumatic water pipe dredger, which is mainly composed of a base pipe, a compressed air bottle and a sheathing head. A short through pipe is arranged in the base pipe.
本实用新型涉及一种气压式水管通水器，主要由基座管、压缩空气瓶及套头所组成；
The building begins with the installation of its base - the central pipe.
这种建筑从安装其基础——中心管开始。
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