Power frequency direct coupling screw type Coaxial integrated structure without any loss, reduce vulnerable parts, high rotation rate. Direct drive coaxial integrated design, dust-proof sound insulation cotton, 70 decibels, protection level IP55, waterproof and dustproof.
[pdf] Screw-type air compressor structure of a unique design, a compact, stylish appearance, high efficiency, small energy consumption, low noise characteristics and long life, is a smart environment-friendly pro.
[pdf] In this study, the fracture of piston for rock drill produced from case hardening steel is investigated. In order to study the causes of the fracture, specimens prepared from the damaged pistons were subject.
[pdf] 
