When the experiment was repeated with a tank full of water in the bottom, the fishes’ lift-to-drag ratio rose from 4.4 to 5.5.
当风洞底部注满水，再重复实验时，飞鱼的升阻比从4.4提高为5.5。
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Tank chain drag chain - new drag chain type cable substantial: at present, the tank chain drag chain - new cable substantial drag chain is my unit named KEM/KDM series tank chain drag chain.
Apply steam to heat the flushing-liquor decanter indirectly to soften the heavy tar depositing on the bottom of tank to decrease the drag of chain scraper.