The first two mechanisms are the main cause of steelcollar failure.
导致钢领失效的原因主要是前两者。
2
Most collar locators detect the magnetic anomaly created by the mass of the steelcollar and transmit a signal to surface-display and depth-correlation equipment.
大多数接箍定位器探测接箍形成的磁异常,并向地面显示和深度对比设备发送一个信号。
3
Does a miner who extracts the coke that makes steel for a wind turbine qualify as a green-collar worker (Newsweek)?