cast iron surface plate functional: 

Made according to sandard JB/T7974-99 , rib type or case type ,recangle/round surface , working surface made by skiving ,groove V/T/U shape and hole of longround shape can be made at the surface of the plate .The surface plate is a plane standard equipment used for testing and drawing of work pieces on it ,The surface plate shall be adjustable to horizontal positaion and laded evenly on each pivot , Environmental temperatire(20±5),and vibration shall be avoided when using

cast iron surface plate specifications