In the annexed engravings are presented a perspective and a plan view of an improved method of operating railroad switches, invented by S. B. ELLITHORP, of...
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
https://www.riss.kr/link?id=O135415390
1856년
eng
학술저널
PHP / Trade Journals / Feature
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
In the annexed engravings are presented a perspective and a plan view of an improved method of operating railroad switches, invented by S. B. ELLITHORP, of...
In the annexed engravings are presented a perspective and a plan view of an improved method of operating railroad switches, invented by S. B. ELLITHORP, of this city, for which a patent application is pending.
TRANSACTIONS OF THE UNITED STATES PATENT OFFICE: Part 1