Full face gaskets extending to the flange face edge as given in American Standard Non-Metal gaskets for Pipe Flanges ANSI B16.21 are required.
根据用于管道法兰的美国非金属衬垫标准ANSIB16.21，需要能够延伸至法兰面边缘的全面衬垫。
Full face gaskets extending to the flange face edge as given in American Standard Non-Metal gaskets for Pipe Flanges ANSI B16.21 are required.
根据用于管道法兰的美国非金属衬垫标准ANSIB16.21，需要能够延伸至法兰面边缘的全面衬垫。
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