基本解释氦泄漏试验英汉例句双语例句Testing progressing and methods for its main points were described especially according to the characteristic of helium-leak apparatus and structure of urea tower.确定了尿素合成塔的氦泄漏试验方法，并对其要点进行了阐述；helium leak test更多例句词组短语短语Method for helium leak testing 氦泄漏测试方法helium leak test更多词组专业释义材料科学氦漏气试验