@article{hbkup:/content/papers/10.5339/qproc.2016.qgbc.30, author = "Kamal, Ahmed", title = "Multi-layer UPVC piping system", journal= "", year = "2016", volume = "2016", number = "3", pages = "", doi = "https://doi.org/10.5339/qproc.2016.qgbc.30", url = "https://www.qscience.com/content/papers/10.5339/qproc.2016.qgbc.30", publisher = "Hamad bin Khalifa University Press (HBKU Press)", issn = "2226-9649", type = "", eid = "30", }