L/A=Letter of Authorization 授权书
　　lbs.=pounds 磅
　　MO=Money Order拨款单,汇款单,汇票
　　m/s=months after sight见票后……月付款
　　m.s.=mail steamer,mail transfer油船,轮船
　　M.T.=metric ton,mail transfer公吨,信汇
　　M/T=Mail Transfer信汇
　　m.v.=motor vessel轮船