Other factors that may affect dam selection are roadways, fishway, locks, and log passages.其他影响选坝的因素有道路, 鱼道, 船闸和筏道等.Choice of fishway intake is the key of success or failure.鱼道进出口的选择:这是鱼道设计成败的关键....
Methods 10 patients with mediastinal tension emphysema were treated by mediastinotomy and drainage.方法本组共收治张力性纵隔气肿患者10例,均行纵隔切开引流术.Lobar emphysema may result from partial bronchial obstruction.大叶性肺气肿可由于局部小支气管梗阻所引起.What can...