Description
holding volume constant across specimens for isolated density comparisons
and 4-pole armature configurations on the same motor frame by swapping interchangeable enameled-copper armatures past a permanent bar magnet on a disc commutator
the halter design keeping arms free for lab
change units
universal 50 x 50mm slide holders
Primary Basic Electricity Kit for 6 Students Graduations_Raised holding volume constant across specimensPrimary level electricity kit for six students with connecting leads, bulb and cell holders, press and two way switches, and an activity guide for introducing circuit construction.
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