Paragraph 1A Equipment, Assemblies and Components
Components made from fluorinated compounds, as follows:
Seals, gaskets, sealants or fuel bladders specially designed for aircraft or aerospace use made from more than 50% of any of the materials specified in heads b. or c. of entry 1C009;
Piezoelectric polymers and copolymers made from vinylidene fluoride:
In sheet or film form; and
With a thickness exceeding 200 micrometre;
Seals, gaskets, valve seats, bladders or diaphragms made from fluoroelastomers containing at least one vinylether monomer, specially designed for aircraft, aerospace or missile use.
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In this sub-head, “missile” means complete rocket systems and unmanned air vehicle systems.
Composite structures or laminates, as followsf1:
Having an organic matrix and made from materials specified in heads c., d. or e. of entry 1C010; or
Having a metal or carbon matrix and made from:
Carbon fibrous or filamentary materials with:
A specific modulus exceeding 10.15 × 106m; and
A specific tensile strength exceeding 17.7 × 104m; or
Materials specified in head c. of entry 1C010.
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Note: This entry does not specify composite structures or laminates made from epoxy resin impregnated carbon fibrous or filamentary materials for the repair of aircraft structures or laminates, provided the size does not exceed 1 m2.
Manufactures of non-fluorinated polymeric substances specified in head a. of entry 1C008, in film, sheet, tape or ribbon form:
With a thickness exceeding 0.254 mm; or
Coated or laminated with carbon, graphite, metals or magnetic substances.
Resaturated pyrolized carbon-carbon materials designed for systems specified in entries 9A004 or 9A104.
Composite structures, other than those specified in entry 1A002, in the form of tubes with an inside diameter of between 75 mm and 400 mm made with fibrous or filamentary materials specified in heads a. or b. of entry 1C010 or entry 1C210f2.
Platinized catalysts specially designed or prepared for promoting the hydrogen isotope exchange reaction between hydrogen and water for the recovery of tritium from heavy water or for the production of heavy water.
Specialized packings for use in separating heavy water from ordinary water and made of phosphor bronze mesh or copper (both chemically treated to improve wettability) and designed for use in vacuum distillation towers.
High-density (lead glass or other) radiation shielding windows greater than 0.3 m on a side and with a density greater than 3 g/cm3 and a thickness of 100 mm or greater and specially designed frames therefor.
Annotations
Footnotes
- f1
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See also entries 1A202, 9A010 and 9A110.
- f2
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See also entry 9A110.