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Kugwiritsa ntchito foni ya Joiwo yosagwirizana ndi nyengo mumsewu

NTHAWI: 2022-04-21 MITU YA NKHANI: 13

From the construction of the first narrow gauge railway from Shanghai to Wusong in 1874, and the 37 years until the overthrow of the Qing Dynasty in 1911, a total of 9,100 kilometers of railways have been built in my country. During this period, more than 230 tunnels with a total length of 42 kilometers were built on 10 railway lines with a total length of 4,600 kilometers.

From 1898 to 1904, my country built the Xing'anling mumphangayo with a length of 3,078 meters, which was the longest wide-gauge railway tunnel in Asia at that time. The most representative tunnel project in this period was the Badaling Tunnel of the Beijing-Zhangjiakou Railway, which was planned and supervised by Zhan Tianyou, an outstanding engineer in my country. This is also the first cross-ridge railway tunnel built by my country itself.

After the founding of New China in 1949, my country's railway construction entered a new period of development. In the second half century, there have been significant technological progress and breakthroughs in tunnel construction in my country.


As we all know, the working environment of msewu  is chinyezi komanso fumbi and dont have good signal, which requires the communication products  to be strong and durable, and also waterproof and moisture-proof. It is difficult for us to use normal office telephone because it is not strong and  the sound will be not clearly. Now  there is a great demand for msewu in today's society, The tunnel telecom system is getting more and more important.

On our platform, we have several hot-selling models of chosalowa madzi TVmafoni, monga JWAT937 ndi JWAT935. JWAT937 ndi mpikisano weatherproof telefoni with IP66-67 defend grade on the platform. It is also possible to customize the product according to the customer's choice, such as changing the color, adjusting the size, changing the ntchito etc. About JWAT935, it is a waterproof phone with 3 programmed function keys on our platform. The material is Robust housing, constructed of cold rolled steel material,and the installation method is wall-mounted.


Joiwo has been in this tunnel telecom Munda chifukwa Kuposa 17 years. We are also a gold seller on Alibaba. We have good professional quality and a good sales and R&D team.

Ngati muli ndi chidwi ndi katundu wathu, chonde omasuka kulankhula nafe, tidzakupatsani ntchito yabwino ndi mtengo.



Ningbo Joiwo Explosion proof Technology Co, LTD

Onjezani: Ayi. 8 Middle Road Guoxiang Bridge Lanjiang Street Yuyao Zhejiang 315400

Nambala: + 86-574-58223617 / Cell / Whatspp / Skype: +8613858200389

E-mail: sales02@joiwo.com

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