ac acuum 真空

acuum decarburization 真空脱碳

adsorption acuum pump 吸附真空泵

acuum Drying Oens 角形真空定温干燥器

acuum two way ale 空真二位阀

ultrahigh acuum pump 超高真空泵

acuum gauge 膜片式真空计

acuum forming 真空成形

acuum breaker 破真空阀