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by default 100%
25) with an aspherical lens and adjustable iris diaphragm
including chemistry
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laboratory Black Iron Tangent Galvanometer, 20X12X12 Cm digital ph meter for laboratory by default 100%laboratory Black Iron Tangent Galvanometer, 20X12X12 Cm Tangent galvanometer t consists of a bakelite molded ring 170 mm,with three sets of winding either 2,50 and 500 turns respectively,carefully insulated,connected to heavy brass terminals. The number of turns is clearly marked between the terminals. The ring is mounted on a pivoted round bakelite base which rotates on an aluminum tripod base fitted with three brass leveling screws. The high
