一种洪涝灾害下安全井盖组合结构

Release time:2019-04-15|Hits:

Affilication of Author(s):土建与水利学院

Patent Applicant:lichuanqi

Type of Patent:实用新型

Application Number:201820997857.9

Number of Inventors:1

Service Invention or Not:no

Application Date:2018-06-26