helium leak test
常見(jiàn)例句
- Testing progressing and methods for its main points were described especially according to the characteristic of helium-leak apparatus and structure of urea tower.
確定了尿素合成塔的氦泄漏試驗(yàn)方法，并對(duì)其要點(diǎn)進(jìn)行了闡述； 返回 helium leak test