荷载疲劳应力
水泥混凝土路面在车辆荷载的反复作用下,面板上最不利荷载位置达到疲劳断裂的应力极为荷载疲劳应力。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧