If the pilot valve spring coupled driven sleeve, inhibited the spring swing to lead more stable valve movement.
若导阀弹簧配上导向套筒，则可抑制弹簧的摇摆，使导阀芯运动更平稳。
Hence, multi-layer polymer injection allocator with single-tubing and sliding sleeve switch is developed, and development, lab experiment and pilot test of this polymer alloca...
为此研制了聚合物单管多层滑套开关式配注器，介绍了滑套开关式配注器研制、室内实验和矿场应用情况。
Hence, multi-layer polymer injection allocator with single-tubing and sliding sleeve switch is developed, and development, lab experiment and pilot test of this polymer alloca...
为此研制了聚合物单管多层滑套开关式配注器，介绍了滑套开关式配注器研制、室内实验和矿场应用情况。
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