It's a complex nonlinear programming question to find the optimization parameter in the Ordering and transporting of steel tube.
钢管订购和运输中的参数优化问题是个复杂的非线性规划问题。
And for customers agency various special steel grade. these steel and special specifications of ordering business.
并可为客户代理各种特殊钢种、特殊规格的订货业务。
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