Rod: The Spring Framework offers proven benefits from design, development, and testing through to production and maintenance.
Rod： Spring Framework从设计、开发和测试，一直到生产和维护方面都提供了切实的好处。
Dye-penetrant testing of the disc trunnions and piston rod heads.
对阀盘、耳轴活塞杆头的染料渗透剂测试。
Figure 4-46 shows a system for testing the resistivity of a bulk material such as a metal bar or rod.
图4 - 46示出测试整块材料，如金属棒或金属条电阻率的系统。
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