Take model of drill pipe frame 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。

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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。

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Outer frame is used advanced digital controled creased bend pipe reduction board machine impacting processing industry galvanized board strong causticity resistance.

外框采用先进的数控折弯机、数控减板机以及数控冲床加工工业，特厚镀锌板，抗腐蚀性极强。

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The towers were "built as a pipe, " with the steel frame of its exterior facade supporting the buildings, he told CNN.

CNN: Debate begins on rebuilding towers