plugged oil flow passage 堵塞的油通道
The core displacement experiment found that the retarded acid working fluid has the capacity of opening the oil flow passage, increasing reservoir production and increasing injection.
通过岩芯驱替实验发现该缓速酸工作液具有打开油流通道，提高地层增产增注的能力。
Add flow passage inside of oil cylinder to let oil run and take heat away.
油缸内增设流道使油液流动起来，带走热量。
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