请翻译以下内容和10个部件，并简要说明它们的各自功能。 All CRT monitors have a CRT, which is a vacuum tube. One end of this tube is a slender cylinder that consists of three electron guns. The wide end of the CRT is the display screen. When power is applied to one or more of the electron guns, a stream of electrons is generated. This stream is subjected to a magnetic field generated by a ring of electromagnets called a yoke. The phosphor coating, when struck by the electro