... hydraulic hoses and couplers are imported products. 3.2. The reversing control is electric-hydraulic ... which is reliable, more accurate with small impact. 3.3. The counterforce on specially designed “S” valve ... be normally operated for at least 30,000 m3. 3.5. Main electric elements are imported original Schneider ... , OMRON, Siemens, LG, etc. 3.6. The open loop of the hydraulic system ...