검색연산자 | 기능 | 검색시 예 |
---|---|---|
() | 우선순위가 가장 높은 연산자 | 예1) (나노 (기계 | machine)) |
공백 | 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 | 예1) (나노 기계) 예2) 나노 장영실 |
| | 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 | 예1) (줄기세포 | 면역) 예2) 줄기세포 | 장영실 |
! | NOT 이후에 있는 검색어가 포함된 문서는 제외 | 예1) (황금 !백금) 예2) !image |
* | 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 | 예) semi* |
"" | 따옴표 내의 구문과 완전히 일치하는 문서만 검색 | 예) "Transform and Quantization" |
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | G01N-001/10 |
미국특허분류(USC) | 73/86386 ; 141/321 |
출원번호 | US-0685840 (1991-04-15) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 6 인용 특허 : 0 |
An inspection drain plug that is removably connected to an aperture in a fluid reservoir. The drain plug comprises an outer hollow body having an open first end and an open second end, the first end being removably connected in a fluid flow relationship to the aperture of the fluid reservoir. A valve mechanism is connected to the outer body, such that the valve mechanism may be selectively operated between an open and closed position, so that the first end of the outer body is closed when the valve is in the closed position. The drain plug also comprises...
An inspection drain plug removably connected to an aperture in a fluid reservoir, said drain plug comprising an outer hollow body having an open, axial, first end and an open, axial, second end, said first end of said body being removably connected in fluid flow relation to the aperture in the fluid reservoir; valve means, connected to said outer body by a support means, said valve being selectively operated between an open position and a closed position, such that said first end of said outer body is closed when said valve is in said closed position; bi...