Drain the system is the important link that the coal mine produce, draining the pump to belong to the coal mine large fix the equipments, the independence is strong, the back up coefficient is big.
排水体系是煤矿出产的重要环节，排抽水机属煤矿大型固定装备，独立性强，备用系数大。
Drain the system is the important link that the coal mine produce, draining the pump to belong to the coal mine large fix the equipments, the independence is strong, the back up coefficient is big.
排水体系是煤矿出产的重要环节，排抽水机属煤矿大型固定装备，独立性强，备用系数大。
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