The quarter turn graduations on the sleeve, with the scribed line on the stem, provide for approximate flow measurement.
在套筒上四分之一转的刻度，以及阀杆上的刻痕，显示大约的流量测量。
Rugged stainless steel gate, long-life packing, stainless steel stem, corrosion resistant yoke sleeve, and heavy duty superstructure.
坚固耐用的不锈钢闸板，经久耐用的填料，不锈钢阀杆，耐腐蚀轭架轴套，重型坚固的上部结构。
Introducing a new type of structure for replaceable stem seal sleeve with containing pressure and analyzing its high performance.
介绍了一种新型的可带压更换阀杆密封的结构，分析了该结构的优良性能。
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