Industrial chemicals; tempering preparations for metals; salts for industrial purposes; quenching agent, namely, chemical agents for quenching steel and quenching fluids for use in metalworking; metal hardening preparations in the nature of chemical additives for accelerating hardening of metal; quenching fluids for use in metalworking; metal tempering preparations; tempering substances, namely, tempering chemicals, used for metal processing; tempering substances, namely, tempering chemicals,...