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Assembly
STEP 1
Attach the Rear Base ASSY (#2) and the Shaped Base ASSY (#3) to the Main Frame 
ASSY (#1) using:
    two Button Head Cap Screw M12*75 (#11)
    four Flat Washer Φ13*Φ26*2 (#15)
    two Nylon Lock Nut M12 (#18)
    two Button Head Cap Screw M10*25 (#13)
    four Flat Washer Φ11*Φ23*2 (#16)
    two Nylon Lock Nut M10 (#19)
Note: Wrench tighten bolts and nylon lock nuts.