µµ»ó´Ü¸é(Ô³ßÉÓ¨Øü, ballast profile or section)
µµ»óµÎ²²(Ô³ßÉý§, depth (or thickness) of ballast)
µµ»óº¸Ãæ(Ô³ßÉÜÍõö, addition (or refilling) of ballast)
µµ»ó¼±Á¤(Óñß¾àÔïÒ)
µµ»ó¾î±úÆø(Ô³ßÉÌ·øë, width of ballast shoulder)
µµ»óÀ¯½Ç(Ô³ßÉêüã÷, fiowing down of ballast)
µµ»óÀÚ°¥(Ô³ßÉ - ) ballast
µµ»óÀÛ¾÷(Ô³ßÉíÂåö, ballast work)
µµ»óÀúÇ×·Â(Ô³ßÉî½ù÷Õô) resisting force of ballast
µµ»óÀúÇ×ÃøÁ¤±â(Ô³ßÉî½ù÷ö´ïÒѦ)