有谁可以帮我翻译一下这篇英文啊 要连贯啊

有谁可以帮我翻译一下这篇英文啊 要连贯啊
Figure 20 is a side elevation of the chuck shown in Figures 18 and 19 partly broken away and in section but with gear holder reversed and for end.
Figure 21 is a sectional view of a gear holding fixture adapted for gaging the gear, the gaging plate being shown in elevation.
Referring first to the construction shown in Figure1 to 4, inclusive, at 1 is shown chuck body which may have its rear face formed to engage with a standard spindle nose at 2 and to be attached thereto as by the Allen screws 3, the chuck body 1has fixed to its outer face, as by Allen screws 4, a circular plate 5,The rear face of this plate 5 is recessed about its margin to form an annular face 6 which may bear against the outer edge of the chuck body 1, Its forward face is shown as provided with an annular groove 7, the outer cylindrical and bottom axially perpendicular face 8 and 9 of which form angularly disposed annular locating faces against which may be engaged a plurality of gear locating and engaging elements 10,As shown five such elements 10 are employed, though more or less might be employed as desired, it being essential however ,that at least three be employed for stable support of the gear.