Objective To understand the powder-trace method for characteristic of rodents footprint and the difference between rodents and little familiar animals, insects indoor.
目的了解粉迹法中家鼠足印的特征及与室内一些常见小动物、昆虫足印的鉴别。
And using the powder trace method to determine the field rat density and calculate the deratization effect.
用粉迹法测定现场鼠密度，计算校正灭鼠率。
A method for testing trace amounts of Si, p, Mn, As, Zn in iron ore powder by ICP - AES is presented, which is convenient, rapid and accurate.
运用电感耦合等离子体发射光谱法测定铁矿石中的硅，磷，锰，砷，锌该方法简便、快速、准确。
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