… such as radar, sonar, infra‑red detection apparatus and scrambling equipment for radio transmissions. Ships of … lifeboats propelled by oars fall in heading 89.03 . (4) Scientific research vessels; laboratory ships; weather …
… of the natural secretion of various sea or fresh water molluscs (especially of the pearl oyster and the pearl … can be distinguished from the latter by special apparatus (endoscope) or by X-ray examination. This heading covers …
… processes, copper powders may also be produced on a smaller scale by gaseous reduction of finely divided oxides, … or through a magnifying glass in the case of flakes, but a microscope is needed for true powders. The method of …
… of an alkali base on a ferrous salt. White solid which discolours in the presence of oxygen, turning into ferric … (hydrated oxide), magnetite (magnetic oxide). (c) Iron scalings, crude oxides which become detached from the …
… (e.g., photopolymer resins or plastics). The UV laser scans and hardens the first layer of plastics and then the … then hardens. (5) Powder bed fusion machines use laser scans or electron beams to melt powder materials layer by …
