B 28   B 36/ MI 4 or B 36-SC/ MI 4 E   B 55-T-5/ MA II 5* B 55-T-7/ MA II 7**   MD-1 (Ex)/ MD-2 (Ex)   4GT (Non-Ex)   ME I 6 (Ex)   MA II 3-12 V   B 4/GT Continuous Duty