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More than Circuit EngineeringAccurate Plumb bob
Схемы >> Projects >> Accurate Plumb bobAccurate Plumb bob
Plumb bob a primitive measuring device of vertical line. Figure 1 - plumb bob on a lace.
Fig.1. Accurate Plumb bob.
Plumb bob provide exactness of establishment of vertical line.
added 23.07.07 19:23:02 | 
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