Note: Each prepayment is valid for 180 days. Within 180 days, a new prepayment will reset the valid period for another 180 days, including all the remaining credits as well as the new prepayment.

注：每次储值有效期为180天，只要在180天内再储值，则可将所有馀额连同新的储值自新的储值日起，再重新计算有效期180天。

youdao

According to the present status of mechanical water shutoff in Jilin oilfield, that is the short valid period and inconvenient operation, a new Y241-114 packer is developed.

针对吉林油田目前机械堵水施工操作不便，堵水有效期短等现状，设计了一种新型封隔器y 2 41 - 114。

youdao