在支腿垂直油缸上装有液压锁，能可靠地防止行驶时支腿活塞杆伸出。
A hydraulic lock is installed on the vertical leg cylinder to avoid extending of the leg piston rod in operation.
根据水压凿岩机液压传动原理和使用要求，详细介绍了凿岩机中冲击器、操纵阀和支腿的结构特点和设计方法。
According to the drive mechanism and the demand of the hydraulic rock drill, the structure character and the designing ways of the impact device, control valve and supporting arm were introduced.
该机的起升、变幅、回转、吊臂伸缩及支腿收放等机构，全部采用液压驱动。
The hoisting, derricking and slewing mechanism, the extension and contracting of booms, the setting down and back of outriggers, all are driven hydraulically.
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