, originally from south africa ,is a special kind of sand for casting , chromite sand is a natural spinel mainly composed of chromite , chrome ore sand for sand moulding used as a highly fireproof sharpener for moulds and cores. product parameters chemical physical cr o %min bulk density - g/cm sio %...
-china(sell) l water tank blow moulding machine , plastic water tank making machine triple layer l triple layer water tank servo blow moulding machine product description ......