Note: the reason why a flow arrow was not used was for applications such as pump isolation whereas preferred sealing direction and the high pressure side are not necessarily the same.

注意：不采用流向箭头的原因是，在某些应用场合，如泵隔离，其优先密封方向和高压面并一定相同。

youdao

Note: the reason why a flow arrow was not used was for applications such as pump isolation whereas preferred sealing direction and the high pressure side are not necessarily the same.

注意：不采用流向箭头的原因是，在某些应用场合，如泵隔离，其优先密封方向和高压面并一定相同。

youdao