Oil temperature drop and oil contraction can cause gas space growing in oil pipe and line packing during hot oil pipeline shutdown and restarting.

热油管道停输后，管内油品降温收缩，管内会产生油蒸气空间，从而使管道再启动时出现启动充装过程。

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The explosion occurred on Botnia’s transfer line for weak malodorous gases when the mill was started up after a 48-hour maintenance shutdown.

此次爆炸发生在这家博特尼亚工厂的低压恶臭气体传输管线上，当时正值该纸浆厂经过48小时保养停产之后的重新启动。

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They can be resident (which gives control over the startup and shutdown of the instance) or dynamic (in which they are brought on-line on demand and then terminated when idle).

它们可以是常驻(用于控制实例的启动和停止)或者动态的(需要时它们在线，空闲时被终止)。

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