—使得阀杆具有操作空间，配置整体的旋转止动装置，用于隔热绝缘，面板安装，或较浅的水下应用。
Provide handle clearance, with the integrity of turning-stops, for insulating, panel-mounting, or shallow submerged applications.
平纹布主要用于保温隔热、屋面防水、化工防腐处理及电器绝缘等。
Plain weave fabric used mainly for thermal insulation, roofing, chemical corrosion and electrical insulation, etc. to deal with.
用于保温隔热绝缘的阀体具有2英寸的加长管径，材质是铸铁或球墨铸铁。
For insulating the body with 2-inch longer diameter, material is cast iron or ductile iron.
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