English to French Bus/Financial Transport / Transportation / Shipping contract

Tjhe list of articles contains the supplier article descriptions, the manufacturers agreed upon by the CLIENT, the price per unit in Euros (if the price is referred to a quotation, in the annex will be listed also the quantity and/or the validity period of the quotation), the expected supply quantifies per year, the lot sizes, frozen window, the article classification (NCNR vs. standard) agreed between SUPPLIER and CLIENT and the buffer stock quantities.

Je ne vois pas à quoi ce terme fait référence. Merci de votre aide.