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According to ISO regulations, when describing the movement of CNC machine tools, a right-handed rectangular coordinate system is used; the coordinate axis parallel to the main shaft is defined as the z axis, and the rotation coordinates around the x, y, a
With the help of a smart doorbell cameras, you'll always know who is at your door, even when you're not home. Tell the delivery man where to leave a package, see when guests have arrived, and know when your kids have left and returned home.
A medical mask, also known as a surgical mask, is intended to be worn during surgery and during nursing to catch the bacteria shed in liquid droplets and aerosols from the wearer's mouth and nose. They are less effective than respirators, such as N95 or F