The component has simple structure and reliable motion by using hydraulically powered swinging townet rods to drive the townet.

这一组件采用液压驱动的摆动网杆带动拖网，结构简单，动作可靠。

Clutches and gearbox units are operated hydraulically.

离合器和变速箱单元靠液压运转。

Today we shall discuss the question of hydraulically (pneumatic) test.

今天我们将讨论水压、(气压)试验题目。

The main valve, globe or angle pattern, is diaphragm actuated, hydraulically operated.

主阀，截止阀或角阀结构，采用隔膜驱动，液压操作。