It is possible for the user to access the menu system even when the handset is in closed position.
它有可能为用户访问该菜单系统,甚至当手机在关闭位置。
Where possible, the closed position should be determined by leak test using water or air, under low pressure.
如果可能的话,可以用水或空气,在低压状态下,对关闭状态进行测试,看看有没有泄漏。
Slamming of check valves is the result of failure of the valve disc to reach its closed position before the fluid flow reversal.
止回阀的撞击现象,是由于在流体倒流之前,阀门的阀瓣没有到达关闭位置造成的。
应用推荐