... ,ASTM,SAE,DIN or special requirements from Customers.1) Chain wheel, gear wheel, sheave, idler wheel, platen, winding drum, helm seat etc. for deck ... etc.(6) Fire grate car, carrier wheel, driving chain, chain wheel etc. for mine metallurgical engineering .(7) Support of bridge applies to bridgework .The product ... declared NK,DNV,BV,ABS,CCS,Germany classification society attestation. chain wheel