操作者操纵台九阀键排控制
operator console nine valve control bank
B2级操作系统
B2 level secure operating system
CY3液压操作机构
CY3 type of hydraulic pressure operation machine
操作者变速杆开关
operator shift lever switch
操作者的击碎防护
operator crush protection
操作者的疏忽致错
careless mistake of operator