The traditional exhaust hood and canopy hood with attached air curtain have different principles.
传统排风罩和气幕上吸罩是两种工作原理不同的局部排风设备。
5mm and 2mm have been prepared by copper mold upper suction casting method for x=2 and x=4 alloys,respectively.
本文用铜模上吸铸法制备Fe78-2xCrxMoxSn2 P10 Si4B4C2 (x =2、4 ,原子百分比 )块体非晶合金系列 ,制备出直径达 2 5mm的Fe74Cr2 Mo2 Sn2 P10 Si4B4C2 非晶合金棒材和直径达 2mm的Fe70 Cr4Mo4Sn2 P10 Si4B4C2 非晶合金棒材。
The complexation reaction of ascorbic acid with Fe(Ⅱ) under various conditions has been investigated by TLC in-situ absorption spectrometry, and two different structures for the chelates were investigated.
本文利用薄层色谱板上吸收光谱研究了抗坏血酸与铁（Ⅱ）离子在不同pH值和不同配比溶液中络合反应情况，并对抗坏血酿-铁（Ⅱ）螯合物的结构进行了探讨。
