当法兰厚度及法兰总高度均采用标准值时，此两部分标记可省略。
When flange thickness and total height adopt standard values, these two parts of marks may be omitted.
所有的伸缩接头(膨胀节)都应当采用法兰栓接。法兰的最小厚度为6毫米。
All expansion joints shall have bolted flange-to-flange type connections on both sides of expansion joint for removal of complete unit. Minimum flange thickness shall be 6 mm.
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