fractional cultivation是什么意思

用法例句

The branch crystal craft system to make tar naphthalene,has strongpoints of high efficiency,saving much energy,strong separation ability.

分部结晶工艺制取焦油萘,具有设备效率高,节能效果明显,分离能力很强的优点。

Multi-axis line cooperative control of separated driving system for textile machine;

织物生产设备的多轴线协调分部传动控制

Briefly talking part project acceptance of hydro and hydroelectric capital construction project;

浅谈水利水电基本建设工程分部工程验收