First of all, the irrational use of release agent is a concrete structure caused by hardening the surface of the main reasons for cellular surface ma.
首先，不合理使用脱模剂是造成硬化混凝土结构表面蜂窝麻面的主要原因。
Lignin is abundant in resources and could be used as oil displacement agent after modification, which may both reduce the irrational utilization of lignin and lower the cost of oil displacement agent.
木质素来源丰富，经过改性可用作驱油剂，从而减少由于不合理使用木质素造成的浪费，同时降低驱油剂的生产成本。
Lignin is abundant in resources and could be used as oil displacement agent after modification, which may both reduce the irrational utilization of lignin and lower the cost of oil displacement agent.
木质素来源丰富，经过改性可用作驱油剂，从而减少由于不合理使用木质素造成的浪费，同时降低驱油剂的生产成本。
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