In order to protect the development of their own industry, the import tariff and import quota of CBU (Completely-Build-Up)are more severe in developing countries, while in terms of KD(Knock-Down)is much lower.

• 为了促进本国工业的发展,各国通常采取一定的贸易保护做法,对于从国外直接进口的完成品CBU(Completely- Build-Up)课以较重的税率并执行严格的进口配额,而以散件KD(Knock-Down)方式进口零件所适用的税率相对都低很多。