该锌-镍合金作为印制板用压延铜箔的阻挡层。
The alloy coating obtained is used as the barrier layer of wrought rolled copper foil in PCB manufacturing.
利用空气煤油（苯甲酸） 水体系，测定了未装填料和分别装填板波填料、丝网填料、压延孔环填料的鼓泡萃取塔水力学性能和传质性能。
Experimental measurements of hydrodynamics and mass transfer have been carried out with air kerosene (benzoic acid) water system and three typical kinds of packing.
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