pressed stem的意思|示意

Letchford pressed his wounds to stem the bleeding, using tattered garbage bags as surgical gloves.

拉提佛用破烂的垃圾袋作为外壳手套，按压他的伤口止血。

Start stem O-ring seal over stem, then press into position as handle is pressed down over stem.

从阀杆上的阀杆O形环密封开始，然后在手柄安装在阀杆上后，将其压进手柄的位置上。

When the closed channel, the wedge-shaped head with a stem to open up the ball and pressed to seal the valve seat.

当关闭通道时，用阀杆的楔形头使球体涨开与阀座压紧达到密封。