What the different between PVC and SVC?
Virtual circuits are usually permanent virtual circuits (PVCs), which means that they are defined for frequent and consistent use by the network. They do not change unless the network manager changes the network. Some common carriers also permit the use of switched virtual circuits (SVCs) although this is not common. Changing PVCs is done using software, but common carriers usually charge each time a PVC is established or removed. The difference between a PVC-Permanent Virtual Circuit and SVC-Switched Virtual Circuit is that an SVC must be reestablished each time data is to be sent. After that the SVC disappears.
An SVC is an on-demand connection that is dynamically established by end devices through the Network-Network Interface (NNI) signaling method. There must be an ATM switch between the end-devices that dynamically route the call through the ATM cloud A PVC is a circuit that a network operator over an ATM-switched network between a specific source and a specific destination manually provisions
There is a lot of differences between PVC and Fiberglass. Fiberglass is going to be stronger and PVC is the plastic tubing that you find in local home repair stores. PVC tubing is cheaper than fiberglass. Fiberglass tubing is lighter in weight. PVC tubing can be bent when heat is applied, but fiberglass tubing is fixed and will break, not bend.
PVC and ABS pipes are made fro different plastic compounds. ABS is based around a styrene and so has a much better impact resistance. It is also good at low temperatures (down to -40 degrees C) whereas PVC gets very brittle even at zero degrees C. ABS and PVC have different properties regarding chemical compatibility so this should be checked. Both plastics are suitable for potable water as long as they are made to teh…
PVC is polyvinyl chloride. this is a plastic which is in the formula of CH2=CHCL = is a double bond. PVC is a thermoplastic material meaning can be melted over and over again. meaning after heating they will harden upon cooling. PVC comes with many different properties depending upon the additivie added to the plastic. yet PVC has many downfalls as it cant be recycled and is dangerous to human health. PVC can leech products…
Usually the PET and PVC bottles are separated by manual before they are washed by washing recycling line. Because the PET and PVC bottles' color, shape, usage are very different, it is very easy to distinguish by manual. But if the mixed PET and PVC flakes, it is very hard to separated by traditional way. But because of their color different, now they can separated by optical sorter.