steel angle短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 角钢 This paper based on the theory and the practice. The mathematical models established was suitable with the practical procedure, so the steel angle CARD system will have the better practicability. 本文理论结合实践，建立了与实际生产情况相适应的数学模型，使角钢 CARD系统具有更好的实用性。 cnki