concrete test beam mould 1. made of steel, 2. BM-S13/14/15/55/56/75 3. 100*100*300/400/500,150*150*500/600/750 concrete test beam mould1. made of steel,2. BM-S13, 100*100*300MM,3. BM-S14, 100*100*400MM,4. BM-S15, 100*100*500MM,5. BM-S55, 150*150*500MM,6. BM-S56, 150*150*600MM,7. BM-S75, 150*150*750MM concrete test beam mould