Welding head shape, intensity and audio etc. Various parameters after many tests, can accord with the most stringent standards, welding head and mould achieve the most perfect match.

焊头的外形、强度以及音频等各种参数经过多次试验，能符合最为严格的标准，焊头和模具达到最完美的匹配。

youdao

After various tests on the virtual prototype (such as making sure vital systems are insulated from lightning strikes), its ceiling, rate of climb and other handling characteristics are fed into a flight simulator.

ECONOMIST: Manufacturing technology