The pressure swing gasproducer is a kind of equipment which can directly produce gas with certain pressure and making use of pieces coal.
变压煤气发生炉是一种以碎煤为原料直接生产带压原料煤气和燃料煤气的制气设备。
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At all events, shut-in of gas Wells would seriously affect the producer and the consumer, and it would mean too high a cost just for taking the average formation pressure.