“试棒”常见的英文表达是 “test bar” 或 “test specimen bar”(更强调是用于测试的试样棒材 )。
例如:
The mechanical properties of the test bar were measured. (测量了试棒的机械性能。)
We prepared several test specimen bars for the experiment. (我们为实验制备了几根试样棒材。 )