C/N ratio can be taken as a rooting index of elm tip.
碳/氮比率可作为白榆新梢生根的指标。
The effect of water binder ratio (W/C) was studied.
对水灰比的影响进行了研究。
Different feed gas ratio could produce synthesis gas of different H/C radio.
原料气各物质的比例不同，可以制备不同碳氢比的合成气。
Different feed gas ratio could produce synthesis gas of different H/C radio.
原料气各物质的比例不同，可以制备不同碳氢比的合成气。
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