Single screw compressor is a new compressor after piston type compressor.
单螺杆压缩机是继活塞式压缩机之后的新一代压缩机。
The piston type unit should be accessible or be provided with an access panel.
活塞型的水锤消除器应该可以接近或设检查口。
The piston may be connected to the upper end of the connecting rod either directly (trunk piston type), or indirectly (crosshead type).
活塞与连杆上端的连接，既可以是直接连接(筒状活塞式)，也可以是间接连接(十字头式)。
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