Disclosed are a method of generating an electronic visitor list using a user terminal, an application for the method, and an application distribution server storing the application. According to the present invention, when a user enters or leaves a space, by exchanging a mobile key and a space identifier between space checkers installed in the user terminal and the space, entry registration and exit registration can be performed, and separate user operations are restricted. The water wheel type oil recovery device includes a filter part, a water supply part, a drainage part, and an oil storage part.

    사용자 단말기를 이용한 출입자 전자명부 생성방법, 그 방법을 위한 어플리케이션 및 그 어플리케이션이 저장된 어플리케이션 분배 서버가 개시된다. 본 발명에 의하면, 사용자는 공간을 출입할 때 사용자 단말기와 공간에 설치된 공간체크기 사이에 모바일 키와 공간식별자를 교환함으로써 입실 등록 및 퇴실 등록을 수행할 수 있고, 별도의 사용자 조작이 제한적이다.


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    Title :

    Oil Skimmer


    Additional title:

    수차형 기름 회수장치


    Contributors:
    OH KYE DONG (author)

    Publication date :

    2022-07-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    E02B HYDRAULIC ENGINEERING , Wasserbau / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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