Which colleague has the book on the skill assessment for operators of wax oil and residue hydrogenation units in PDF format?
Thread Content
Which colleague has it in PDF format?
I haven’t seen an electronic version of the wax oil guide; you can buy a print copy on Taobao. As for the PDF version on the motherboard, it’s hard to find via Baidu – basically no one creates such versions, so it’s more convenient to have a physical copy to refer to~~~~