ad valorem method
... ad valorem import deposit 进口从价保证金 ad valorem import duty 从价进口税 ad valorem method （拉）从价方法，从价法; 从价法 ...
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研究表明：一价阴离子选择膜电渗析法从粗钨酸钠溶液中脱除游离碱是经济可行的。
It has been proved that it is economical and feasible to eliminate educt alkali from coarse sodium tungstate with electrodialysis method of negative ion (1) selective membrane.
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