东汉末据北海淳于一带的海贼首领。建安十一年秋八月，为曹操部将乐进、李典所击破，逃往海岛。后曹操从何夔计，遣郡丞黄珍往，为陈成败，管承等于是请降。
详细叙述了生产离心铸管承口芯的不同工艺方法及其优缺点，并从不同角度加以对比。
The different processes used to make faucet cores for centrifugally cast pipes production as well as their advantages and shortages was described in detail, and compared from different angles.
有必要采用底漆来渗透和软化管道和管件承插端口表面，使得液状粘固剂能够完全粘结。
Primer is necessary to penetrate and soften both pipe and fitting socket surfaces in order for the solvent cement to properly bond.
根据桩土体系之间的关系，取消承台，对罐基础采用高强预应力管桩的桩土复合地基设计。
Based on the relation of pile with earth, cancel the slab to design container foundation adopting high intensity prestressed pipe pile.
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