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bronchus segmentalis posterior canonical extension conveying pipe Cymbidium iridioides double-ionization gauge downscale Hidalgo del Parral isoamyl aniline isocarveol melt diffusion transistor metaloxidesilicon movable sand heap Ophiorrhiza rufopunctata optical rotatory power pomeranz rubb shuttle feeler thread cutter telecommunication laser Tomes' process triple busbar substation