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07-06-2011, 07:39 AM	#22
~~Figleaf23~~ Banned Join Date: Apr 2008	Re: [LT] Portcullises Eight men to operate a mechanism for lifting a 900lb grate is only slightly less off that 8 men to operate a mechanism for lifting a 450 lb grate. Is there a medieval engineer in the house? What's the efficiency of pulleyed lifting systems at TL3?

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