export proceeds for goods in foreign exchange or foreign exchange income generated from entrepot business characterized by an initial payment and subsequent reimbursement and other types of transactions among which export proceeds in foreign exchange settled under a documentary letter of creditpayment guarantee and documentary collection shall be sold to designated foreign exchange banks upon the presentation of valid commercial documents and export proceeds for goods in foreign exchange settled by remittance shall be sold to designated foreign exchange banks upon the presentation of the verif

结汇货物出口所得或者以先付后还为特点的转口业务的外汇收入，以及其他以跟单信用证、付款保证、跟单托收方式结汇的出口所得，凭有效商业单证和结汇货物出口所得，售予外汇指定银行凭核销凭证汇付售予外汇指定银行

以上为机器翻译结果，长、整句建议使用 人工翻译 。