目前状态监测设备(系统)主要具有哪些监测、分析功能?
滑动轴承对润滑脂要求是什么?
When lowering manropes alongside a stage rigged over the side of a vessel,they should be allowed to trail in the water(). to easily remove the kinks that form in the lines。 to allow the seamen on the stage to know the direction and strength of the current。 to provide the seaman something to hold onto if he or she falls from the stage into the water。 only for short periods of time since they will become waterlogged and be very heavy to pull u。
设备材料有哪几类?
叙述可编程序控制器编程的基本原则。
下列激励方式属于企业成熟阶段激励模式的是()。