Field experiments was used to study the change of soil N2O discharge flux in the northwestern arid and semi-arid areas.
田间试验研究了西北干旱半干旱地区地膜覆盖对土壤中n 2o排放通量变化的影响。
2
It was indicated that the corona discharge treatment was necessary in some applied field of polyester film.
讨论了聚酯薄膜电晕处理及其应用的关系，指出在一些应用范围电晕处理的必要性。
3
The method was adapt broad crested weir theory derivation to calculation flood rate of discharge and conjecture design rate of discharge through field investigate information of bridge.