Fomula bilong skelim hevi bilong 'steel coil' em: Hevi (kg)=Width (mm) × Tickness (mm) × Length (m) × Density (g/cm3) × 0.001. Olsem, long nomol kabon ain (densiti 7.85 g/cm3), sapos koil i 1000 mm bikpela, 1 mm tik, na 200 m longpela, hevi bilong en=1000 × 1 × 200 × 7.85 × 0.001=1570 kg.
Toksave: 1. Ol i mas stretim ol 'density values' bihainim ol samting ol i wokim (eksampel, 'stainless steel' em 7.93 g/cm3);
2. Longpela bilong en em ol i save skelim long ausait diamita bilong koil na yusim dispela fomula: Longpela (m)=(Ausait Diamita2 - Insait Diamita2) × 0.7854 ÷ Tiknes (mm) ÷ 1000;
3. Indastri i larim ±5% weit tolerans. Nau yet mipela i save salim ol samting bilong klinim ain long ol stua. Ol dispela prodak i yusim wanpela 'high-efficiency liquid formula we i gutpela long ol 'pre-peinting tritmen na i stap insait long 25 kg barel bilong yusim long indastri.
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