1. Primary Analysis on Feature and Genesis of Tiemenshuan Carbonate Manganese Deposit in Wangshan of Guizhou; 万山特区铁门闩碳酸锰矿床特征及成因浅析更多例句>> 2) long iron door bolt 长铁门闩3) a bolt; a bar; a latch 门闩 例句>> 4) gate-latch circuit 门闩电路...