国产女人夜夜做-国产女上位-国产女同精品9-国产欧韩日美一区-国产欧美xxxxx特-国产欧美岛国乱伦-国产欧美福利姬在线-国产欧美日韩精品另类-国产欧美日韩另类伪娘-国产欧美日韩一区-国产欧美日韩孕妇-国产拍拍

Dongying Dongda Machinery Manufacturing Co., Ltd. provides you with high-quality products and services

Dongying Dongda Machinery Manufacturing Co., Ltd. is a professional manufacturer of petroleum drilling and production equipment and accessories. It is a national high-tech enterpri......More

2023-07-04

Introduction to the main products of Dongda Machinery

In the development of more than a decade, a product system has been formed, mainly consisting of wellhead connection devices and ground equipment such as pumping unit accessories, ......More

2020-05-12

Dongying Dongda Machinery Manufacturing Co., Ltd

1、 Company ProfileDongying Dongda Machinery Manufacturing Co., Ltd. is located in Dongying City, the beautiful and rich Yellow River Delta - the site of Shengli Oilfield and the es......More

2020-05-12

Summary of one week's intelligent manufacturing events: Yunnan announces 20 intelligent manufacturing trials

According to China Petrochemical News, a group of cutting-edge technologies and innovative achievements were showcased at the recently concluded 2018 World Manufacturing Conference......More

2020-05-12

Introduction to Dongda Machinery Manufacturing Production Equipment

We have purchased several high-precision equipment such as VB-825A and NBP-1000A vertical machining centers, large vertical gantry planer and milling machines, large CNC boring mac......More

2019-12-15

Dongying Dongda Machinery Manufacturing Co., Ltd. Qualification and Honor

Company Honors......More

2019-12-15

Introduction to Professional Knowledge Related to Pressure Vessels

Today, the editor will introduce to you the professional knowledge about pressure vessels.Introduction to Pressure VesselsPressure vessel (y ā l ì r ó ng q ì), English: pressure ve......More

2019-12-15

China's machinery industry focuses on high-end equipment during the 12th Five Year Plan period

The "12th Five Year Plan for the Development of Machinery Industry" recently released by the China Machinery Industry Federation proposes that during the 12th Five Year Plan period......More

2018-09-19

Intelligent manufacturing inspires new vitality in traditional enterprises

According to a report by Fujian Daily, in the face of new situations and opportunities, on July 5th, Zhangzhou City held a city wide conference on network security and information ......More

2018-07-26

Speed regulation method of speed regulating motor

Variable pole logarithmic speed regulationThis speed regulation method uses changing the wiring of the stator winding to change the number of stator poles of the cage motor to achi......More

2018-07-23