快速更换墨管。
当储墨管插上笔头组件后，凸管顶破封膜，使墨水流向笔尖，即能书写。
After the ink tube is inserted in the pen head component, the seal film is broken by the convex tube upwards, ink flows into a pen point, and a user can write.
墨菲则要求对高管实行封顶薪水。
本文介绍了PLC控制系统组成、浇铸工艺流程、及PLC在离心球墨铸管机中的控制原理。
This paper discusses PLC control system formation, casting technical process and control theory of PLC in centrifugal casting iron pipe machine.
结果表明：用冶炼高钛渣的副产半钢生产球墨铸管在工艺上是可行的。
As a result, it is feasible that making of ductile iron pipe use of semi-steel.
煤气压力的稳定性是保证球墨铸管退火质量的关键。
The stability of gas pressure is crucial to assure the quality of ductile cast iron pipes.
本实用新型涉及球墨铸管企业生产用的辅助配件，特别指一种支承铸管转动的新型托轮。
The utility model relates to an auxiliary accessory used for production of a ductile pipe casing enterprise, in particular to a novel supporting wheel for supporting a cast pipe to rotate.
本实用新型涉及球墨铸管企业生产用的辅助配件，特别指一种支承铸管转动的新型托轮。
The utility model relates to an auxiliary accessory used for production of a ductile pipe casing enterprise, in particular to a novel supporting wheel for supporting a cast pipe to rotate.
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