短语词组短语Plunger r stroke 柱塞行程plunger stroke 12 mm 活塞行程12毫米number of plunger stroke [机]柱塞行程数plunger stroke loss 柱塞冲程available plunger stroke length 柱塞有效冲程net plunger stroke 柱塞实际冲程loss of plunger stroke 冲程损失 返回 plunger stroke