Compared with the fresh-keeping method using oxygen-absorbing bottle, it features simple technique and low cost.
与国外正在研制的吸氧瓶盖保鲜法相比较,本发明技术简易而费用较低。
Comparing with orifice flowmeter, it features simple structure, ease installation and maintenance as well as wide range.
与孔板流量计相比,具有结构简单,安装、维护方便,测量范围宽等特点。
It features simple processing method, high cure rate and no toxic side-effect.
其加工方法简单,治愈率高,无毒副作用等特点。
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