gear transmission |
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| navigate by keyword : gears technology transmission rackwheel gearbox gearing gearwheel engineering sketch project blueprint illustration technical design industry machine draft hand drawing mechanical mechanism draw equipment line construction wheel industrial detail rotate engine outline mechanics spin gear connection motor rotation system turning rotating cogs gearshift modelling pinion power teeth mechanic tech turn development group joint relationship teamwork blackboard chalk chalkboard black board blue |
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| Hand drawing on blackboard gear transmission |
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