谁会翻译这些的，十分谢谢！急啊~~
   A constant-diameter cam gets its name because the centers of the rollers are a constant distance apart. By the motion of follower, constant-diameter cam mechanisms can be classified as two types: one with a translation follower, the other with a planar motion follower which refers to the follower moving in combination of translation and oscillation in this paper. The former is simple, common to use and easy to design [1–4], the latter is known to be complicated and quite difficult to design. Fig. 1 shows a constant-diameter cam mechanism with a planar motion follower, and its radial form has been synthesized by centro method [5].
    The mechanism of Fig. 1 is designed for converting the cam rotation to a desired output motion of the rocker AC. Such conversion can also be obtained by some other types of cam follower systems. However,designers may prefer the mechanism to other cam mechanisms because of following considerations: compared with a force-closed cam mechanism, the mechanism withstands lower contact stress because it is a form-closed cam mechanism and no force is required to maintain the contact between its cam and follower; compared with a conjugate cam mechanism in which a set of two cams must be used, the mechanism is simpler in construction because only one cam is needed; compared with a constant-breadth cam mechanism of which the cam profile should be convex everywhere [6], the mechanism possesses wider adaptability to the output motion because its cam profile could be concave. For instance, Chen and Chen used the radial form of the mechanism for shed opening mechanism of weaving machine [7]. The mentioned shed opening mechanism is similar to the mechanism of Fig. 1, but a ‘‘T’’ shaped arm replaces the rocker AC in Fig. 1 and the ‘‘I’’ branch of the arm functions as the rocker AC. Two heald frames are respectively connected to the ends of other two branches of the arm by couplers. While the cam rotates, the arm oscillates and drives the two heald frames to move up and down in turn..
    Up to now, the mechanism of Fig. 1 has received few attentions and the design of this mechanism remains to be a challenging task. In this paper, the mechanism is systematically investigated. Several essential problems about the mechanism, such as the relations between cam angles and geometric parameters, the allowable values of some angular parameters, the equations of cam profile and the return motion of rocker AC, are solved.The corresponding equations and algorithms are developed, which are useful in the design and application of the mechanism.

谁会翻译这些的，十分谢谢！急啊~~
   A constant-diameter cam gets its name because the centers of the rollers are a constant distance apart. By the motion of follower, constant-diameter cam mechanisms can be classified as two types: one with a translation follower, the other with a planar motion follower which refers to the follower moving in combination of translation and oscillation in this paper. The former is simple, common to use and easy to design [1–4], the latter is known to be complicated and quite difficult to design. Fig. 1 shows a constant-diameter cam mechanism with a planar motion follower, and its radial form has been synthesized by centro method [5].
    The mechanism of Fig. 1 is designed for converting the cam rotation to a desired output motion of the rocker AC. Such conversion can also be obtained by some other types of cam follower systems. However,designers may prefer the mechanism to other cam mechanisms because of following considerations: compared with a force-closed cam mechanism, the mechanism withstands lower contact stress because it is a form-closed cam mechanism and no force is required to maintain the contact between its cam and follower; compared with a conjugate cam mechanism in which a set of two cams must be used, the mechanism is simpler in construction because only one cam is needed; compared with a constant-breadth cam mechanism of which the cam profile should be convex everywhere [6], the mechanism possesses wider adaptability to the output motion because its cam profile could be concave. For instance, Chen and Chen used the radial form of the mechanism for shed opening mechanism of weaving machine [7]. The mentioned shed opening mechanism is similar to the mechanism of Fig. 1, but a ‘‘T’’ shaped arm replaces the rocker AC in Fig. 1 and the ‘‘I’’ branch of the arm functions as the rocker AC. Two heald frames are respectively connected to the ends of other two branches of the arm by couplers. While the cam rotates, the arm oscillates and drives the two heald frames to move up and down in turn..
    Up to now, the mechanism of Fig. 1 has received few attentions and the design of this mechanism remains to be a challenging task. In this paper, the mechanism is systematically investigated. Several essential problems about the mechanism, such as the relations between cam angles and geometric parameters, the allowable values of some angular parameters, the equations of cam profile and the return motion of rocker AC, are solved.The corresponding equations and algorithms are developed, which are useful in the design and application of the mechanism.