. . . . . . . . "SDN:L22::NETT0168" . . "accepted"@en . . "WP-2 standard net as described by UNESCO Working Party 2 (1968)"@en . . "WP2 standard net" . "WP2 standard net"@en . "Plankton net described as the UNESCO WP-2 standard net (UNESCO Working Party 2, 1968); designed with single circular (ring) mouth piece with measurements: diameter (metre)=0.57; with opening area (square metre)=0.25; with total filtering net length (metre)=2.61; with filtering net shape cylindrical-conical; with filtration ratio (ratio of mesh aperture to mouth area)=6:1; with mesh size (millimetre)=0.2; and equipped with closing rope mechanism and a Tsurumi-Seiki Kosakusho (TSK) flowmeter or equivalent centred at 14.25 cm from rim and optional second flowmeter placed at equivalent distance outside the rim."@en .