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Aerospace series — Fluid systems — Hydraulic system tubing
40.20 DIS ballot initiated: 12 weeks
Aircraft — Hydraulic components — Marking to indicate fluid for which component is approved
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Aerospace series — Graphic symbols for schematic drawings of hydraulic and pneumatic systems and components
50.00 Final text received or FDIS registered for formal approval