... .0/1.2 casting feed frame without "P"504 is the code for wire feed frame we have 21,401,402, ... 404,501,502,504,P504 serialD is the position ... from the positive direction)"D"is the right handle,"E"is the left handle.A is the diameter of roll,Uni:mm ... "A"means the roll diameter is ø30,"B"means the roll diameter is ø40V is the type of roll ,we have ...