1. concrete   jian zao zhe   ju [ti;ti]   chuan mu   hua lun   Hint Half-n-half Clue   2. bulldozer   hua lun   tui tu ji   jian chu ，[gao;hao] ，[gao;hao]   [jia;jiao;jue] shou jia   Half-n-half Clue   3. rafter   kui jia ，an quan mao   chuan mu   han tie   she xian   Half-n-half Clue   4. pickax, pickaxe, pick axe   jian chu ，[gao;hao] ，[gao;hao]   ban ，ban tiao   du lun [che;ju]   [jia;jiao;jue] shou jia   Half-n-half Clue   5. stone   jian zao zhe   hua lun   cuo shi ci dai   [dan;shi] tou   Half-n-half Clue   6. pulley   ban ，ban tiao   tie qiao   hua lun   tui tu ji   Half-n-half Clue   7. cement   [dan;shi] tou   shui [ni;ni]   [ni;ni] gong ，[wa;wa] gong   tui tu ji   Half-n-half Clue