上海海事大学国际物流 高洁
Reasons for shipping by air Commodities are of a high value-to-weight ratio, or are perishable, quickly obsolete(过时), required on short notice, or expensive to handle or store; Demand is unpredictable, infrequent, exceeds local supply, or is seasonal; The risk of pilferage, breakage, or deterioration is great; The cost of insurance is high for long periods of transit; Heavy packaging is required for surface transportation; To lower warehousing costs; Difficult terrain(地形) or the lack of rail, port, or road infrastructure; There is risk of losing a customer or halting production due to the lack of an urgently-needed repair part.上海海事大学高洁