explosionssicheres gehaeuse for wechselsprech, lautsprech or telephone

• 1. 用于个人应急反应系统的扬声器电话和扩展扬声器电话 [P] . 中国专利： CN102067580B . 2015.04.01
• 2. 用于个人应急反应系统的扬声器电话和扩展扬声器电话 [P] . 中国专利： CN102067580A . 2011-05-18
• 3. procedures for the operation of wechselsprech, gegensprech or lautsprech plants [P] . 瑞士专利： CH481540A . 1969-11-15

  机译： 对讲机，对讲机或扬声器工厂的操作程序

• 4. schaltungsanordnung for wechselsprech - lautsprech with modern conference equipment [P] . 德国专利： DE000000918759B . 1954-10-04

  机译： 具有现代会议设备的对讲机扬声器电路

• 5. keyboard to linienwähler - wechselsprech - lautsprech station. [P] . 瑞士专利： CH272111A . 1950-11-30

  机译： 键盘到线路选择器-对讲机-扬声器站。

• 1. A Market Investigation on Telephones,Handsets and Pagers in China [J] . 中国对外贸易：英文版 . 2000,第007期
• 2. First Case of Web Telephone Service──Two Brothers Were Charged With Illegal Telephone Business on Internet [J] . 中国对外贸易：英文版 . 1999,第005期
• 3. PC Telephones in China [J] . 中国对外贸易：英文版 . 1994,第010期
• 4. EFFECTIVE METHOD FOR IDENTIFICATION OF NUMBERS OF TELEPHONE LINES TO WHICH THE CORDLESS TELEPHONES OPERATING IN GSM FREQUENCY BANDS [C] . Georgij Leontjev, Albinas Visockas, Oficyna Wydawnicza Politechniki Wroclawskiej Electromagnetic Compatibility, International Wroclaw Symposium and Exhibition . 2004
• 5. Essays on the Economics of Telephones and Evolving Technologies. [D] . Thacker, Michael James. 2016
• 6. Tumour risk associated with use of cellular telephones or cordless desktop telephones [O] . Lennart Hardell, Kjell Hansson Mild, Michael Carlberg, 2006
• 7. Tumour risk associated with use of cellular telephones or cordless desktop telephones [O] . Söderqvist Fredrik, Carlberg Michael, Mild Kjell, 2006

• 1. Mobile telephones and rates of brain cancer [J] . Muscat JE Hinsvark M Malkin M . 中国神经肿瘤杂志 . 2006,第3期
• 2. Hello,can you hear me?Orthopaedic clinic telephone consultations in the COVID-19 era-a patient and clinician perspective [J] . Anuhya Vusirikala ,David Ensor ,Ajay K Asokan . 世界骨科杂志：英文版 . 2021,第1期
• 3. 对讲机与公用电话网的接口设计 [C] . 陈淑武 ,程恩 ,陈东明 . 中国航空学会信号与信息处理专业第六届学术会议 . 2002
• 4. 智能型无主机防爆扩音对讲电话系统的研究 [A] . 蔡友发 . 2001