... and protector plate etc, involving the trademark of Caterpillar, Jcb, Esco, Komatsu, Hitachi, with over 700 varieties of categories, accounting ... and protector plate etc, involving the trademark of Caterpillar, Jcb, Esco, Komatsu, Hitachi, with over 700 varieties of categories, accounting ... advanced testing instruments for chemistry, mechanicals and heat treatment to guarantee the required specification ...