Yucheng Diamond Industry Development Road

Abstract I. The initial stage: the production of the workshop, the development of the Xinghuo Yuyuan Yucheng diamond industry began in the mid-eighties of the last century. At that time, there was a state-owned enterprise drawing die

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GPS is a terminal that performs positioning or navigation by receiving satellite signals. The antenna must be used to receive the signal. GPS satellite signals are divided into L1 and L2, and the frequencies are 1575.42 MHz and 1228 MHz, respectively. L1 is an open civil signal and the signal

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Real human clone doll is extremely high in simulation

For Japanese brides, the wedding photos are outdated. The most fashionable thing today is to make a 3D printed real human clone doll for the bride, let it permanently record the bride's

What is the cause of the vibration generated by the centrifugal pump?

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Replace the lower bearing of the door machine with the jacking method