Sub-zero valve 低温阀门
zero lash valve lifter 无隙起阀器 ; 无间隙气门挺杆
zero-lash valve tappet 无间隙的气门挺杆
zero lap valve 零叠量阀
Automatic zero set valve 自动定零阀
Zero opening valve 零开口阀
Zero adjustment valve 代表零点调整设置
zero-lash valve lifter 无隙起阀器
zero clearance valve tappet 无间隙气门挺杆
Provides a continuous range of valve lifts, from zero to maximum.
提供了一个气门升程连续从零到最大范围。
The idea behind the constant current load is that with a constant current load, the valve is almost perfectly linear (near ZERO distortion).
恒流源负载的思路取自胆管在恒流源负载的条件下可以接近完美的线性（接近零失真）。
Ball valve fully open, the flow resistance is very small, almost zero, so the ball valve diameter is widely used in petroleum and natural gas pipelines because the pipeline cleaning easy.
球阀在完全开启时，流阻很小，几乎等于零，因此等径球阀广泛应用于石油天然气管线中，因为容易清扫管线。
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