“rising stem ”可以造什么句，rising stem 造句
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The Fig. 1710 Balancing valve is a non-rising stem design incorporating a parabolic (plug) shaped disc.
"While they are more compact than rising stem valves, the stem threads are always exposed to flowing media, allowing for possible erosion/corrosion. Open/close indication is not provided with this design."
Sluice valves are to be of a non-rising stem type and to have solid wedge discs.
Motor actuators for rising stem valves can be powered by air, gas, hydraulic or electric power.
