Only "key equipment and other materials necessary for technical transformation which cannot be readily obtainable in China" will enjoy exemptions from customs duties prior to 1990, according to Gu.
按照谷牧的说法，只有“关键设备和中国不能轻易得到的技术改造所必需的其他材料”在1990年前将享受免除海关税。
Therefore, technical transformation was made on the flowsheet and the transformed flowsheet and equipment suit better to the ore properties and has achieved better results.
通过对流程进行技术改造，使流程和设备适应了矿石性质，取得了较好的效果。
These methods should be applied not only in the operation of enterprises with newly imported technology and equipment, but also in the technical transformation of existing enterprises.
不仅新引进的企业要按人家的先进方法去办，原有企业的改造也要采用先进的方法。
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