DF49-20/RE-MD DF49-20/RE-MD(61) DF49-20DS-0.4H DF49-20DS-0.4H(51) DF49-20P-0.4SD DF49-20P-0.4SD(51) DF49-20P-SHL DF49-20S-0.4H DF49-20S-0.4H(51) DF49-20S-0.4V