Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde › Aldehyde-alcohols, aldehyde-ethers, aldehyde-phenols and aldehydes with other oxygen function
291249Subheading
291249 — Other:
Loại khác:
Codes under heading 291249
Distinguish from heading:3606Ferro…
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