It is composed of cylinder sleeve and crankcase ventilation, and generally adopts high toughness gray cast iron CNC machine tool bed. It is the human body that supports the net weight of cylinder barrel, engine crankshaft tissue and any other parts and ensures the proper relative position between the parts. The cylinder is of cylinder barrel structure and installed in the cylinder barrel seat hole on the engine cylinder block to facilitate the repair or replacement of the damaged cylinder. Therefore, the structure is simple and the maintenance is convenient.

It is composed of cylinder sleeve and crankcase ventilation, and generally adopts high toughness gray cast iron CNC machine tool bed. It is the human body that supports the net weight of cylinder barrel, engine crankshaft tissue and any other parts and ensures the proper relative position between the parts. The cylinder is of cylinder barrel structure and installed in the cylinder barrel seat hole on the engine cylinder block to facilitate the repair or replacement of the damaged cylinder. Therefore, the structure is simple and the maintenance is convenient.

The integrated water quality automatic monitoring station is a comprehensive online automatic detection system composed of conventional multi parameter online water quality analyzer, automatic measurement technology, automatic analysis technology, automatic control technology, computer application technology, communication network technology and other multidisciplinary modern technologies. The main function is to monitor the water quality change situation in real time, grasp the pollutant flux passing through the monitoring section qualitatively and quantitatively, and monitor the time variation law of pollutant concentration and flux in the section, so as to provide scientific basis for the pollution prevention and control of the basin and its supervision and management.

The machining process of camshaft hole is divided into two processes: rough boring and fine boring. For the rough boring of camshaft holes of large and medium-sized engines, the special machine (or jig) for rough boring of shaft holes is generally used.