N any salt or ester of sulphurous acid, containing the ions SO3 2– or HSO3 – (hydrogen sulphite) or the groups –SO3 or –HSO3. The salts are usually soluble crystalline compounds 亚硫酸盐
Chemical wood pulp, sulphite, other than dissolving grades.
亚硫酸盐木浆，但溶解级的除外。
Coniferous chemical wood pulp, sulphite other than dissolving grades, unbleached.
针叶树亚硫酸盐化学木浆，溶解级除外，未漂白。
Non-coniferous chemical wood pulp, sulphite, other than dissolving grades, unbleached.
非针叶树亚硫酸盐化学木浆，溶解级除外，未漂白。
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