电机停止，活塞杆能自锁在任意位置上，处于保压状态。
When the motor stops, the piston rod can self-lock at any locations, in the state of pressure keeping.
有了适当的排气，射速可以提高，充填和保压可达良好状态，不须过度增加料管和喷嘴的温度。
With proper venting, the injection speed could be increased to achieve good fill and pack conditions, without having to raise the barrel and nozzle heats, improperly.
无论是对于垫层方案或是保压方案，是否设置伸缩节和止推环对蜗壳应力状态影响均较小。
For MSCL and MHWH, the setting up of expansion joint and anti-thrust ring will not much affect the stress distributions of SC and surrounding concrete.
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