安哥拉原油出口增加。在产量减少的国家中，原因多为因故停产和炼厂进行维护，而不是因为主动限制产量。
Angolan exports rose. In countries where output has fallen, the drop was the result of outages and maintenance rather than voluntary restraint.
某炼厂焦化炉注蒸汽控制系统不能正常运行，注汽量突增造成炉管出口温度大的反向响应。
The response of the outlet temperature to the sudden steam increasing is a large inverse response.
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