在特殊情况下或特殊井架,不能使用旋转扒杆拆、安井架时,可使用单扒杆作业,安全负荷为20kN。
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钢丝绳在用作起重、提升或牵引设备时,常常需要与吊钩、索扣等连接起来,做成各种型式的吊索,便于起吊或牵引重物,一般采用打结法,卡接法和插接法。
一般情况下棕绳强度大于白麻绳强度,九股、四股的比三股的好。
In what ways would the Life is Good managers (corporate and retail store) have to deal with the challenges of customer service, innovation, and sustainability? Be specific in your description.
What skills would be most important to a manager like Jeff Bourk? Explain your choices.