The exercise comprised four phases spreading over a 14 - week period , with a series of simulated terrorist incidents
2.
And vibration function make supplies viscidity and interior frictional force of particle reduce greatly , make the sport tempo of the particle of the supplies increase , has increased the number of times of colliding effectively , accelerate cement particle surface hyrate to speed that liquid phase spread , is it fully go on to mix and stir at micro competence to guarantee
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