The presence of fake drugs is more prevalent in countries with weak drug regulationcontrol and enforcement.
在药物管制控制和执行薄弱的国家假药的存在更为普遍。
2
The work principle of BLM electric crane's speed regulationcontrol is analyzed in this paper based on the structure of its electric control system.
文章根据BLM电动起货机控制系统的结构，分析了该起货机的调速控制工作原理。
3
First this paper research on using variable speed fluid couplings in speed regulationcontrol system of dual pumps or fans machines running in parallel mode.