On line observation of quality control is a pivotal task for Advanced Process Control(APC). The on line observation system of crude tower side draw quality control for APC was built.

为了实时获得原油分馏中待控质量指标的可靠数据，保证先进过程控制的应用效果，建立了分馏过程侧线质量指标的在线观测计算系统；

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The Tower Bridge stands just on the south side of the Tower of London.

伦敦塔桥就在伦敦塔的南边。

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The tallest part of the tower block is side-on to the river, along which the prevailing wind blows.

BBC: Wind death in Leeds prompts tower safety fears

In Fengyuan, a 12-story apartment building peeled off from an adjoining tower and landed on its side, killing at least 13 of the 71 occupants.

CNN: ASIANOW - TIME Asia | Taiwan: The Day the Earth Moved--Page 3

Then word emerged that NYPD security concerns might force builders to move the Freedom Tower far from the adjacent West Side Highway.

NPR: Critique of Freedom Tower Leads to Redesign