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In the field of mechanical design, there are many uncertain phenomena. One of its main man…
A vacuum pump is a device that creates, improves and maintains a vacuum in a confined spac…
People who often drive on the expressway will find that the road sound barrier is constantly …
According to the Ministry of Science and Technology, according to the Ministry of Science and …
From the tracking of the nine Taiwanese LED chip companies in October, the total revenue r…
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