Architectural glass (architectural glass) of the main varieties of flat glass , crystal having a surface smooth , light, sound insulation , thermal insulation, wear resistance, climate change , material stability and other advantages.
A bird control spike, also known as an From Wikipedia, the free encyclopediaBird control spikes on a building frontage sign."Barber's pole" border marker with spike on the former Inner German border.A bird control spike, also known as an anti-roosting spike[1] or roost modification, is a device cons