To explore suitable fertilization method of rice direct seeding on dry land, plot experiment of different base-manure amounts was designed and carried out.
为探索适合水稻旱直播栽培的施肥方法，开展不同基肥用量的小区试验。
This experiment has designed take monolithic integrated circuit 89C51 as the basic control core simple numerical control direct-current power supply.
本实验设计了一个以单片机89C51为基本控制核心的简易电流电压信号发生器。
This experiment has designed take monolithic integrated circuit 89C51 as the basic control core simple numerical control direct-current power supply.
本实验设计了一个以单片机89C51为基本控制核心的简易电流电压信号发生器。
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