sealed-bid tender

例句：

1. 1.The company is conducting a sealed-bid tender for the new office equipment.
   该公司正在对新的办公设备进行密封递价招标。
2. 2. The bidding process is strictly confidential, ensuring that only qualified bidders can participate in the sealed-bid tender.
   竞标过程严格保密，确保只有合格的竞标者才能参与密封递价招标。
3. 3.During the sealed-bid tender, all bidders are required to submit their proposals and documents electronically.
   在密封递价招标期间，所有竞标者都需要提交他们的提案和文件电子版。