The practice show that quality and radioactivity of the product, which is made by gangue and some condensing agent, can meet related national regulation after 28 days' natural maintenance.
研究结果表明：用煤矸石和适量固化剂制成的非烧结砖经过28d自然养护后，其质量和放射性均符合国家有关标准。
The methods for preparing structural material bonding agent by condensing the alkaline lignin in the wast liquor of soda pulping process with formaldehyde and phenol are described.
本文叙述了利用碱法制浆废液中的碱木素同苯酚、甲醛缩合制取结构材料粘合剂的方法。
This method contains steps as follows: pre-processing raw material, adding extracting agent which contains ionic liquid, centrifuging, filtering, purifying and condensing the extracting liquid.
该方法包括下列步骤：原料预处理，加入含离子液体的萃取剂，萃取液离心、过滤、纯化、浓缩即可。
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