All documents must indicate this documentary credit number and NTN .

所有的文件必须指出信用证号码和NTN 。

NTN import bearings can be made according to customer requirements of various non-standard bearings.

NTN进口轴承，还可根据客户要求订做各类非标轴承。

Methods The NTN means of transportation were introduced and the clinic advantages of the transportation were analyzed.

介绍新生儿转运网络方法及分析有关效果的资料。