当钻井平台下沉时，立管倒塌，自动弯折，但不会转离防喷器。
When the Deepwater Horizon sank, this riser collapsed and folded in on itself, but did not sheer off from the blowout preventer.
本发明是一种在节能灯管制造中将直管弯折加工成螺旋管时加热软化用的弯管加热炉。
The invention provides a bent-tube heating furnace for heating and softening when a straight tube is processed into a spiral tube by bending in energy-saving lamp manufacture.
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