Hand clenched cloth after the release, the visible wrinkle and crease recovery, not easy.
用手捏紧布料后松开，可见明显折皱，且折痕不易恢复原状。
Hand tight cloth after the release, the crease is not obvious, and easy to recover.
手捏紧布料后松开，折痕不明显，且易恢复原状。
A method for improving the ability of JZXC 480 track circuit once adjusting was presented. The method is to in crease the ratio of release voltage and work voltage of track relay.
为提高JZXC - 480型轨道电路一次调整的能力，提出改变轨道继电器返还系数的方法，并进行计算机仿真计算。
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