A usance credit obviously calls for a time draft, and the usance <I>var</I>ies from 30,60, to as long as 180 days.
A usance credit obviously calls for a time draft, and the usance varies from 30,60, to as long as 180 days.
远期信用证显然要使用远期汇票。付款期限可为30天，60天甚至可长达180天。