testing jig

例句：

1. 1. The engineerused a testing jig to ensure theaccuracy of the measurements.
   工程师使用测试夹具来确保测量的准确性。
2. 2. Thetechnician was using a testingjig to check the qualityof the metal before it was sentout for production.
   技术员正在使用测试夹具检查金属的质量，以便在生产前进行质量控制。
3. 3. The machine tool manufacturer provideda testing jig to help thecustomer test the machine's performance.
   机床制造商提供了测试夹具，帮助客户测试机器的性能。