TEHNICAL CALCULATION AND ESTIMATOR'S MAN-HOUR MANUAL All 40 years of my working life, I spent on erection of different process plants most of which were oil industry projects in the country and abroad, in Europe and North Africa. In this book you can find out more about my working expirience and precise man hour manual for piping above gruond and others Estimations.info~Site InfoWhoisTrace RouteRBL Check