When the pressure difference changes with time, a phase shift will occur between the transient pressure difference and displace of valve flap, which could cause leakage and even reverse flow.
当阀片两侧的压差随时间变化时，阀片的启闭与压差的变化之间存在一定的相位差，有可能引起泄漏甚至反向流动。
The confidential placed in a stable place, the placement of power and ground to ensure safety before use, equipped with the power of 750 watts, reverse-time shift, the machine behind the pipe mouth.
肉丸成型机要放置在平稳的地方，安上电源及地线，确保安全，方可使用，配用功率750瓦，逆时转向，机器后面有水管口。
The confidential placed in a stable place, the placement of power and ground to ensure safety before use, equipped with the power of 750 watts, reverse-time shift, the machine behind the pipe mouth.
肉丸成型机要放置在平稳的地方，安上电源及地线，确保安全，方可使用，配用功率750瓦，逆时转向，机器后面有水管口。
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