spool off or take in 放绳或收绳
pay-off spool 放线盘
film reel-off spool 胶卷放片轴
spool l shut-off valve 滑阀式截止阀
cutting-off valve spool 切断型阀芯
The film slipped off the winding spool.
胶片从卷轴上松脱了。
To improve the response speed of on-off solenoid valve of big flux, detailed analysis on poppet valve is given and an on-off solenoid valve with movement of both spool and cover is designed.
通过对锥阀特性的分析，设计了一种阀芯、阀套同时运动的芯套双动高速开关阀，该阀增大了高速开关阀的开口度，提高了响应速度和流量。
It is shown that the model can properly simulate the performance of single-spool gas generator even in the states of off-design rotating speed and small flux.
结果表明：该模型能够模拟单轴燃气发生器的性能，并能实现非设计转速小流量工况下的性能仿真。
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