不可转让提单 meaning in Chinese

flat bill of lading
non-negotiable bill of lading

As requested ， we are sending you under separate cover two copies of our invoice no . 6689 ， two copies of insur - ance policy no . 5629 and one copy of non - negotiable b / l no . 2030 covering the consignment of 1 ， 200 bales cloth for your order no . 5757 under our contract no . 92838
按要求，我们另封寄上我方第92838号合同项下贵方第5757号订单所订1200包灰布的有关单据，即第6687号发票两份，第5629号保险单两份，第2030号不可转让提单一份。