In this paper , the intelligent non - central - switching explosion - proof amplifying call and telephone talk system which is suitable for the inflammable and explosive , large - scaled and strong - noised working space is developed by recurring to the techniques of the computer , the electronics and the communication 本文采用计算机技术、电子技术和通信技术研制了适合于易燃、易爆、大范围、强噪声的生产场所使用的智能型无主机防爆扩音对讲电话系统。
The hotel has 4 halls for special usage : two conference hall , a guest receiveng rooms , a lecture hall , function hall with the capacity of 500 pcoplc . the halls are furnishcd with tv stereos , vcd , projectors , slide projects and audio amplifiers , it is really a good place for meetings and business actyvities 饭店配置了会议厅、会见厅、报告厅、洽谈厅、休息厅以及可容纳500人的多功能厅等四个专用会场，配有投资80多万元的电视音响、影碟机、投影仪、幻灯机和扩音设备等专业仪器，是举办各种会议和商务洽谈的绝佳场所。
Locale needs special person to control , play - and - plug . inputting entry of six groups has 6v power supply with eidolon . if matching meeting transmitter hc - 808 hc - 706 and interface transmitter , you can build up a small meeting expanding sound system , which makes conference room installed easily and use every time 与界面话筒配接可广泛的应用在现有教学扩音设备的升级改造，替代原有手持话筒领夹无线话筒，教师讲课无需携带任何设备，彻底摆脱话筒的束缚，无需专人管理，即开即用。
The technique of the multi - channels sharing and the bus topological structure are adopted in the system , which does n ' t set the central switch and which not only can realize many users share a few explosion - proof channels , but also reduce the cost of the channels , while improving the utilization factor of them . the users " extension is flexible and convenient . the system has the functions of amplifying call and telephone talk 该系统不设主机，采用多信道共用技术和总线式拓扑结构，实现多用户共用少数防爆绳路，降低了绳路成本且提高了利用率；用户扩展灵活、方便：具有扩音呼叫和电话对讲功能；工程布线简单，费用低，工期短。
Based on the intelligent non - central - switching amplifying call and telephone talk system , the ky - 2 - type non - central - switching factory communication telephone system is developed in this paper . the system is suitable for the large - scaled and strong - noised working space , is developed by using the techniques of the computer , the electronics and the communication 本文在原有智能型无主机扩音对讲电话系统的基础上，研制了符合大范围、强噪声的生产场所通信要求的ky - 2型无主机工厂通信系统。
However , this was the first time that initiates attempted to draw public attention to the need for environmental protection . speaking through loudspeakers on a vehicle , initiates reminded tourists and local inhabitants of the importance of environmental protection and invited them to join in the effort to clean up the environment 过去数年来，经常不定期捡拾两座水库周遭的垃圾，然而为了唤起更多人对环境的重视，此次我们首度使用宣传车，利用扩音设备沿途对游客及住家宣导环保的重要，希望一起来维护我们环境的整洁。
The beijing karmel culture art development center is engaged in the domestic and foreign large - scale displays , the demonstration design manufacture , the display equipment manufacture sale and rental , the opening ceremony booth build , the opening ceremony cuts the ribbon , the etiquette service , the military band performance , the basket of flowers bouquet of flowers , the furniture rents , the celebrity manages , the dragon dance lion dance , the imposing percussion instrument , the light sound , the lift - off balloon , the balloon releases for flight , the fireworks salute , the cartoon arched entrance , the model manufacture , the sash colored flag , the scroll theater curtain , balloon printing , each kind of orchestra , the scene arrangement , the chinese dress rents , stage dance america , the video frequency projection , the sound amplifies , simultaneous interpretation and so on a series of services 北京卡梅尔文化艺术发展中心是从事国内外大型展览、展示设计制作、展览器材制作租售、开幕式的展台搭建、开幕式的剪彩、礼仪服务、军乐队演奏、花篮花束、桌椅租赁、名人主持、舞龙舞狮、威风锣鼓、灯光音响、升空气球、气球放飞、礼花礼炮、卡通拱门、模型制作、授带彩旗、条幅幕布、气球印刷、各种乐队、场景布置、旗袍租赁、舞台舞美、视频投影、音响扩音、同声传译等一系列的服务。
He recommends staying well hydrated , not screaming or yelling , using microphones and other amplification when speaking or performing in front of a crowd , not smoking , using good breath support when you speak by filling your lungs with air regularly , and warming up the voice before using it with exercises such as tongue trills and humming 他建议平时应多喝水；不要尖声或大声叫喊；进行演讲或演出时应使用话筒或其他扩音设备；不要吸烟；讲话时注意调匀呼吸,这样嗓子就会比较省力；用嗓前作些卷舌发音或是小声哼唱之类的“热嗓”运动。
The hotel has prepared six conference rooms with different sizes , such as meeting hall , reporting hall , negotiation hall , and multi - functional hall that can hold about 200 people . they are equipped , with tv , audio , vcd , projector and slide projector , etc , the halls are the perfect places for holding different kinds of conferences and talking over business 饭店配置了小会议厅、会见厅、报告厅、洽谈厅、会见休息厅，以及可容纳200人的多功能厅等6个专用会议厅，配备电视、音响、影碟机、投影仪、幻灯机和扩音设备等专业仪器，是举办各种会议和商务洽谈的绝佳场所。
