Most electronic devices of this kind，（）manufactured for export，are tightly packed.
举一反三
- This kind of glasses manufactured by experienced craftsmen ______ comfortably.
- Power electronic devices may be classified into four categories:______ 、______ 、______ 、______ .
- Many electronic devices can ____________ if they're not used properly.
- Electronic devices can connect to one another in different ways.
- Electronic devices account for the largest amount in China’s export. （ ）