Requirements for reinforcement of civil air defense threshold

Stiffening ribs at the lower part and corner of shear wall and 45 at the corner of ring beam.

Eight-character tendons, also known as merchant tendons, are broad-minded and insightful. Not only can he keep up appearances and learn to drive Tao Zhu, but he is also rich in economy and countryside. He is a pure businessman with no vanity. You can work hard if you have the right intentions.

Civil air defense works, also known as civil air defense works, refer to underground protective buildings built separately for wartime protection of personnel and materials, civil air defense command and medical rescue, and basements built in combination with ground buildings that can be used for air defense in wartime.