The chemicalreaction that follows is very complex and continues for many years, and the concrete just keeps getting harder.
接下来的化学反应非常复杂,会持续很多年,混凝土只会变得越来越硬。
2
New type cemented carbide of ternary complex boride base prepared by reaction boronizing sintering technique has excellent physical, chemical and mechanical properties.
反应硼化烧结法制备的三元复合硼化物基新型硬质合金,具有优良的物理、化学、力学性能。
3
Due to the variety of organic compounds and the complex of chemicalreaction, the method of teaching organic chemistry is different from other fundamental courses.