以粗纱布或细筛过筛，便可将花粉同柔荑花序的其它部分分开。
The pollen can then be separated from the rest of the catkin by sieving through cheesecloth or fine screen.
“大部分人认为这些和他们健康和安全有关的产品是经过筛选的。事实上不是这样。”她说。
"Most people assume that products have already been screened for health and safety. That's just not true," she said.
本机电器部分采用PLC触摸屏控制，液压系统采用电动油泵，增加过筛、除尘装置，自动化程度高。
The electric part USES PLC touch screen control, hydraulic system USES an electric pump to increase screening and dedusting equipment with high degree of automation.
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