Mobile Stone Crusher Gujarat In Ahmadabad - Cone Crusher. Cone crusher used in sand and gravel yards, concrete sand, dry mortar, construction waste, artificial sand, power plant desulfurization, and other industries, used to crush medium and medium above hardness (below 350 MPa) of various ores and rocks, such as calcite, limestone, granite, river pebbles, Royal Engineering was started in the year 1995. Our company has been flourishing under the guidance of the Mr Bharatbhai G. Sharma and Mr Anujbhai B. Sharma and presently situated in Dhansura, Gujarat. The products like crusher machine, vibrating screen, sand production, sand-washing, coal crushing and handling system, etc. are manufactured by us. It offers a complete range of products like Crushing, screening, Grinding, Sand making and washing, mineral handling plant, and mineral washing plant equipment. The Royal brand was renamed R-Techno in the year 2013. ... They are one of the leading Crusher Machine manufacturers in Gujarat.