预先运用这种劳动， 除对极小规模的生产以外，对任何生产活动都是必不可少的条件。
This previous employment of labour is an indispensable condition to every productive operation, on any other than the very smallest scale.
考虑当目标函数在约束条件下的最优值作扰动时，使各约束作极小扰动的非线性规划问题。
The nonlinear programming problem that the constraint perturbation attains minimum under the condition when the objective function makes its optimal perturbation is considered.
在考虑了装配公差和形状位置公差的条件下，采用极大极小法，给出了该型发射装置改进后的平行度计算方法。
Taking into account assembly tolerance and geometric tolerance, with the maximum and minimum method, a parallel degree calculating method for the missile launcher is put forward.
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