Setting time of concrete

Finer grinding in a proper way will reduce the setting time of concrete made by shaft kiln cement containing F. However, it is impossible to...

适当细磨可以缩短含氟立窑水泥配制混凝土的凝结时间，但无法消除立窑水泥配制混凝土凝结时间偏长的缺点。

Yet the task will be much tougher than five years ago: instead of setting goals, this time leaders must agree on concrete decisions to achieve them.

不过与五年前相比，任务将更加艰巨，这次领导人不是制订目标，而是为实现这些目标商定具体的决策。

Yet the task will be much tougher than five years ag instead of setting goals, this time leaders must agree on concrete decisions to achieve them.

不过与五年前相比，任务将更加艰巨，这次领导人不是制订目标，而是为实现这些目标商定具体的决策。