Why see lightning first and then later heard the sound of thunder? What is the situation that the lemon cooking gas inside the pipes?

أفضل جواب: After water pressure test it has to be removed from the system. Then using nitrogen gas leak test has to ... الإطلاع على المزيد

أفضل جواب: <p>In My Opinion and Practice, I prefer clean agent such as NOVEC-1230 gas</p> <p> < ... الإطلاع على المزيد

أفضل جواب: Sir iam Tukuna reddy from India .i am oli and gas plant work 4 years. India work experience 3+.91+7873472 ... الإطلاع على المزيد

أفضل جواب: <p style="text-align:justify;"><span><span><span>Thanks to Mr. Shahzad ... الإطلاع على المزيد