The impact force is applied by a falling steel ball instead of the springhammer (USA).
用一个跌落的钢球而不是用弹簧冲击器来施加冲击力(美国)。
2
The design method of damping spring in vibration hammer is developed in this paper. Espacially a selecting range is introduced for calculating damping parameter, which is useful in design.
介绍了振动锤隔振弹簧设计方法给出了隔振参数计算必要的取值范围，可供实际设计参考。
3
The ALC? is an in-line, spring assisted, single guided "wafer" check valve designed to prevent "water hammer" and "reverse" flow.