ENG
Construction Methods
Main Materials
Performance and Economics
Testing & Certification
Sequence & Application Sectors
Construction method & Features
Specialized in Architecture, Civil & Plant Engineering
21-03-03 20:34
복합 헬리컬파일 국내 특허가 추가 등록되었습니다.
다수의 특허권 확보로 권리범위를 확대하였습니다.