secondary expansion

In the system design, goals and constraints expansion method of secondary voltage multi-objective model is proposed at first.

系统设计中，首先提出二级电压多目标控制模型中目标与约束的扩展方法，保证工程实际中二级电压多目标控制方法的通用性。

This paper sums up the experience on the modification of continuous slab caster, which includes the improvements on the oscillator, secondary cooling system, withdrawal and straightening machine, torch cutter, capacity expansion of tundish.

总结板坯连铸机改造的经验，主要包括振动装置、二冷系统、拉矫机、切割机、中间罐扩容的改造；

Air conduit was renovated to prevent secondary-air conduit from burning out, and expansion compensation for air conduit was also renovated and all these methods achieved good results.

为防止下二次风管烧损，对风管型式进行了改进，并尝试改造了风管的膨胀补偿方式，取得了良好效果。

So even if the birthrate should rise somewhat, little expansion is possible for secondary school enrollments.

因此,即使出生率有所上升, 中小学入学人数不可能有大的增长.

The vast expansion in secondary education is putting an enormous strain on the system.

中等教育的大幅扩张正对该系统造成巨大压力。