2500t(1600t+900t)+800t+800t+800t with dual side-moving bolster

B1: Danly 2500 ton (1600t+900t), 1978, D4-1600-900-144x96 with dual side-moving bolster (3657 x 2438 mm)
B2: Danly 800 ton, 1977, S4-800-144x96 with dual side-moving bolster (3657 x 2438 mm)
B3: Danly 800 ton, 1977, S4-800-144x96 with dual side-moving bolster (3657 x 2438 mm)
B4: Danly 800 ton, 1977, S4-800-144x96 with dual side-moving bolster (3657 x 2438 mm)