The engine - feed system interface is at the turbopump inlet flanges.发动机与供应系统的交界是在涡轮泵的进口法兰盘处.The web and flanges of the main girders were fabricated from ASTM A 441 steel.主梁的腹板和翼缘用ASTMA441钢制造.During fabrication slots for...
撤换他们吧,接替的也许更不中用.The men who would replace them would probably be even worse.石油枯竭后可接替的液体燃料是什么?After Petroleum is Gone, What Then?惠民南斜坡是胜利油田油气资源接替的新探区.The southern slope of Huimin is a new exploration area for replacement ...
...a bowl of fir cones.一碗冷杉树球果The rotten degree of fir trees is an important sign of quality of Abies forest.冷杉林木腐朽程度是冷杉林分质量变化的重要标志.Conifer tree style such as pine, fir, spruce, redwood, juniper, etc.针叶类树包括松树 、 杉树 、 云杉 、...