求翻译：空运和海运都是通过DSV运输公司运输的,只是前一次是空运，后一次是海运，海运是客户订货时要求的，附件是两张运单。是什么意思？

Air and sea freight are transported by dsv transport company, just before the time the air after a sea shipping customer orders require the attachment is two waybill.

Air and sea transport is through the transport DSV transport company before, but it is a time when air, sea, and is a customer on the basis of the order Shipping is requested, the annex is two consignment note.

The aerial transport and the marine transportation all are transport through the DSV transport company, only is the preceding time is the aerial transport, the latter time is the marine transportation, the marine transportation is when the customer ordering requests, the appendix is two bills of lad

Aviation and maritime transport through transport company DSV transport, but previous air, once after shipping, shipping is requested by the customer when ordering the annex was two waybill.

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