With various relative lengths of the links, this four-bar linkage becomes a useful mechanism for converting uniform rotary to non-uniform rotary motion or continuous rotary to oscillatory motion.
改变这些杆的相对长度，这种四杆连杆机构就成为一种实用的机械装置，可以把等速转动转变为非等速转动，或者把连续转动转变成振荡运动。
With various relative lengths of the links, this four-bar linkage becomes a useful mechanism for converting uniform rotary to non-uniform rotary motion or continuous rotary to oscillatory motion.
改变这些杆的相对长度，这种四杆连杆机构就成为一种实用的机械装置，可以把等速转动转变为非等速转动，或者把连续转动转变成振荡运动。
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