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The technical scheme further optimized by the utility model is that the valve seat 7 is made of polytrifluorochloroethylene.原来如此。A complete computer system consists of hardware and software. As the name implies, hardware is the physical equipment that can be seen and touched in the computer, such as the host computer. Software, on the other hand, is relative to hardware. It refers to various programs and related documents needed to run on the computer, such as a drawing software or a gobang game. Computer hardware and software are indispensable. Hardware is the material basis on which software can work and is the "body". Software is the soul of the computer and the core of controlling and operating the computer. They complement each other and form a complete computer system. From the appearance, the computer includes: monitor, host computer, keyboard, mouse and sound box.板栗也在心中激烈挣扎，最终也慢慢走出来，跪下求情。Established in, sales have increased by more than 100% for five consecutive years, with an average price of more than 100 RMB and limited sales. It is reported that Stance is in张一和张鑫本是建筑领域令人艳羡的佳偶，张一怀孕后张鑫主动提出辞职照顾家庭，到如今女儿笑笑已经五岁。从表面上看，事业稳步上升，家庭美满幸福，张一没有意识到，她已经处在被谎言包裹的漩涡之中……但是他想依旧有南下进攻中原的想法，哪怕先行占领了之后再退回来也是可以的，所为的就是一雪前耻。