… an aperture (e.g., gate, disc, ball, plug, needle or diaphragm). They may be operated by hand (by means of a key, … stopper which is generally controlled by a pressure device (diaphragm, bellows, capsule, etc.) damped by an adjustable …
… generally classified in this heading are : (a) Cobaltite, sulphide and arsenide of cobalt. (b) Heterogenite, hydrated oxide of cobalt. (c) Linnaeite, sulphide of cobalt and nickel. (d) Smaltite, cobalt …
… neighbouring carbon atom by a double bond (e.g., ketene, diphenylketene). This heading however excludes diketene … trifluoride complexes with acetic acid, diethyl ether or phenol* . (3) Dithymol di‑iodide . …
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