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航空工业部贵阳液压附件厂所研制的适用于建筑机械和其它机械液压系统中的其额定压力为320巴、最高压力为400巴的ZBN—H系列恒功率液压双联泵、ZM—H系列定量
The ZBN-H series constant power hydraulic double pumps and ZM-H series rations developed by Guiyang Hydraulic Accessories Factory for use in construction machinery and other mechanical hydraulic systems with a rated pressure of 320 bar and a maximum pressure of 400 bar