… In flotation processes, this sulphide promotes the absorption of oil on the surface of ores by sulphiding. Also … as a de‑hairing agent in tanning, in dyeing, as a copper absorbent in nickel refining, as a reducing agent in organic …
… another vehicle, appliance or load. They may contain subsidiary provision for the transport, in connection with … goods, or provision for fitting with working tools as a subsidiary function. The heading does not cover propelling …
