“proportional valve”可以造什么句，proportional valve造句

The proportional valve can be opened sufficiently slowly to provide a smooth acceleration of the lift up to its maximum speed.

A proportional valve spool therefore has wider lands with notches cut into the edges.

As described earlier, the electrical current to the solenoid of a proportional valve needs to be regulated and not just simply switched on or off as is the case with a conventional valve.