试棒 meaning in Chinese

coupon

Standard test methods for notched bar impact testing of metallic materials
金属材料切口试棒冲击试验的标准试验方法
Are tensile bars used as a means of controlling physical properties of the metal
是否使用抗拉试棒来控制金属的物理特性？
Attached test bar
附铸试棒
Standard test method for calibration of atmospheric corrosion test chambers by change in mass of copper coupons
通过铜试棒质量变化对大气腐蚀试验室进行校准的标准试验方法
Who are the tesile bars tested by ? if done by an outside lab , is shipment held until results are obtained
试棒由谁来测试？如果是由厂外的实验室测试，是否在得到测试结果之后才会发货？

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