Gas-fired graphite type drying furnace design

Gas-fired graphite type drying furnace design Lv Zhigang National Machinery Industry Bureau Design and Research Institute, Tianjin 3001901 Document identification code ugly 1 刖 Lu Meizhen 4 team casting, limited to 4 existing graphite casting 甩 drying 逍 using electric he

PVC card type health certificate production

In the previous health certificate, the certificate and photo were sealed inside the paper before printing on the paper to prevent water from immersing. Moreover, it is cumbersome to operate, and it takes time and effort to print, cut, paste photos, plastic seals, etc. More and more health