信号工要确保井筒内无人,才能发送升降信号.Signal worker can't send hoisting signal until be ensure that no worker is in it.人员通行,必须通知信号工和卷扬工.It must be advised signal worker and winch operator when personnel is passing by....
"Getting nowhere fast," pronounced Crosby, "that's what we're doing."克罗斯比断言说：“我们一无所获，在做无用功。”"Jobs for the boys," said Crosby irreverently.“任人唯亲，”克罗斯比轻蔑地说。'We had a mountain to climb after the second goal w...
In other cases, such as inventories, inputs and outputs are both continuous.在另一些情况下, 比如存货, 其投入和产出都是持续不断的.A part of a program's workspace that is used to hold inputs and outputs.程序工作区的一部分,用于保存输入输出数据.By the LED numeri...