通过加水或湿沙可调节压路机配重和接地比压，调节方便范围大；
Operating weight and ground contact pressure can be adjusted by filling water or wet sand with greater adjusting scope.
通过对螺杆压缩机风量调节系统的改造，可以使螺杆压缩机正常工作，维修简单方便，动作可靠，故障率低。
Based on the reform of the air regulation system of worm compressor make the compressor normal work, repaire simple and convenience, and the rate of breakdown low.
全量程气量无级调节是活塞式压缩机气量调节方法中的一种，具有经济、安全及维修方便等特点。
Full-range capacity stepless control is one of the methods of capacity regulating for reciprocating compressor, and it possesses economic, safe and well-fixing character.
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