PTW kya hota h | what is permit to work

PTW kya hota hain | what is permit to work kya hota h PTW / PTW ka use kya hain l what is permit to work how many types of PTW isse kya fayda hain permit to work kya hota h safety rules kis liye hota hai aagar kuch ho jaye site par to PTW kaise jan bachata hain aagar PTW na ho to kya hoga #ptw kya hota hain what is permit to work #_viral #_______full_support