Elevation kaise marking kare, reference line kaise dekhe

[@sunnyrajofficial6691]

Sir ab slop marking bataiye ke bare me bataiye

[@sunnyrajofficial6691]

Hame bhi laga dijiye kaam

[@sunnyrajofficial6691]

Sir ek question h agar sell alag alag h jab ham sell jo joint karenge to malum kaise chalega ki mera jiro degree kaha aayega