针对石油割缝筛管的现状，开发出了一种新型复合缝腔割缝筛管。
Aimed at the current status of petroleum slotted sieve tube, a kind of new typed slotted sieve tube with compound slot was developed.
针对石油割缝筛管的现状，开发出了一种新型复合缝腔割缝筛管。
Aimed at the current status of petroleum slotted sieve tube, a kind of new typed slotted sieve tube with compound slot was developed.
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