With points from the lecture, explain the formation of collapse sinkhole.

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With points from the lecture, explain the formation of collapse sinkhole.

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Wed, 02/27/2013 - 22:05 Lauren 88.33 Check this speaking
Wed, 06/17/2015 - 00:31 piyo 53.33 Check this speaking
Mon, 02/25/2013 - 04:26 Vanan 100.00 Check this speaking
Mon, 02/25/2013 - 04:07 Vanan 95.00 Check this speaking
Tue, 10/28/2014 - 11:33 svt.ntu 85.00 Check this speaking
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