摘要: Unit 001 Basic building materials include: timber, mud, stone, marble, brick, tile, steel, and cement concrete. Masonry walls are built with stones or bricks, cohered through the use of mortar, first... 阅读全文
posted @ 2013-10-20 01:10 Ritchie(乞戈) 阅读(2279) 评论(0) 推荐(0) 编辑