SS400 yog ib daim hlau carbon uas ua raws li tus qauv Nyiv Pooj JIS G3101. Nws sib raug rau Q235B hauv tus qauv hauv tebchaws Suav, nrog lub zog tensile ntawm 400 MPa. Vim nws muaj cov pa roj carbon nruab nrab, nws muaj cov khoom zoo sib npaug, ua tiav...
Thaum cov chaw ua hlau tsim cov kav hlau, lawv muab lawv ua cov duab hexagonal kom yooj yim thauj thiab suav. Txhua pob muaj rau lub kav ib sab. Muaj pes tsawg lub kav hauv txhua pob? Teb: 3n (n-1) + 1, qhov twg n yog tus naj npawb ntawm cov kav ntawm ib sab ntawm sab nraud...