Development of twin-screw air compressors in Argentina

Due to the growing need for the compressed air of higher quality, the water-lubricated twin-screw compressor with water as the only liquid in the compressor has drawn much attention to produce clean air a. [pdf]

Shallow well drilling rig manufacturers

Price-performance leaders include Jining Hengwang's crawler rig ($1,400 at volume) and Henan Ocean's diesel unit ($3,000 fixed price). For hard rock applications, Shandong Instanton's 5.0-rated rig provides premium capabilities at mid-range pricing. [pdf]