HYDROMETER PETROLEUM A.P.I., NO.4 RANGE 39 TO 51
A glass instrument for measuring the density of petroleum, made to the industrial standards of the A.P.I. (American Petroleum Institute). Graduated in 0.1 and 300 mm in length.
HYDROMETER PETROLEUM A.P.I., NO.4 RANGE 39 TO 51
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A glass instrument for measuring the density of petroleum, made to the industrial standards of the A.P.I. (American Petroleum Institute). Graduated in 0.1 and 300 mm in length.