真空气密性 meaning in Chinese

vacuum tightness

That seal stress influences to the intensity of seal connect has been studied . generally , the seal connect stress being always harmful to the quality and the reliability of seal parts , it will decline the strength of the seal parts when the stress increases
一般情况下,封接应力的存在将直接影响封接件的强度和真空气密性,封接应力对封接件的质量和可靠性总是有害的,随着封接应力增大,封接件强度随之下降。