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  2.  > Thu High Efficient Durable Gravel Sand Making Machine

thu high efficient durable gravel sand making machine

LONTTO Concrete block making machineis of high efficiency easy to operate long service lifespan easy to maintain and repair etc With a cement of 12 p0 and medium sand of 30 gravel is 54 the watercement ratio should be 0304 For the porous block cement should be lesser at 10 and sand at 20 but should have more gravel at 64

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