A shielding device includes two elongated, parallel tubes joined at a distal portion, and a shield at least one of removably and slidably situated at the distal portion. 0 equivalent of epoxy group in the epoxy resin to 0. According to a first embodiment of this invention, the crown is secured to the root portion by a flexible abutment post. Also, a configuration switch may be set to cause the dialog to be handed off to an operator even if a response at some level of the ASR dialog is successfully recognized. The commands include a mode register set command specifying a new mode register setting for one or more ranks of memory devices and a mode register type. A tube connects the outlet of the vaporizing tube to the element for regulating a flow rate and a pressure of vaporized gas.