Take model of drill pipeframe as a example, experimental modal based on ODS s testing method is studied and the modal parameter is distinguished and the testing results are analyzed.
以钻架模型为实例，研究了其ODS测试方法试验模态，识别其模态参数，分析其测试结果。
2
Use lots of padding - foam pipe cladding from a DIY shop is perfect for protecting your frame and very cheap.
使用大量填充物——DIY商店里的泡沫管覆盖膜是保护自行车车身的绝佳物，而且非常便宜。
3
Outer frame is used advanced digital controled creased bend pipe reduction board machine impacting processing industry galvanized board strong causticity resistance.