Hanging lines for the rig tongs must be inspected at regular intervals and be in good working condition.
必须定期检查大钳悬吊绳，使其处于良好的备用状态。
The dashed lines hanging from the boxes are called object lifelines, representing the life span of the object during the scenario being modeled.
从各个框垂下来的虚线称为对象生命线，表示在对方案建模期间对象的生命跨度。
Many are hit by trains or cars, or electrocuted by low-hanging power lines. Others fall to ivory poachers.
很多被汽车或者火车撞到，要么就是被低处的电线电到。
应用推荐