The drift diameter used depends on the size and weight of the tubular being checked.
所用的通径取决于被检查管子的直径和重量。
The drift diameter is the inside diameter (ID) that the pipe manufacturer guarantees per specifications.
通径规的直径就是管子生产商所能够确保的每一管子说明书上的内径。
Plate connected with electric control valve which had large drift diameter, have three -position valve function.
板式连接大通径电控换向阀，有三位阀功能。
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