import cadquery as cq
w0=cq.Workplane('YZ',origin=(25,0,0))
w1=cq.Workplane('XY',origin=(0,0,-4))
r=w0.workplane(offset=28/2).moveTo(66.5,-89).box(31,22,28).union(w0.sketch().push([(55,82)]).circle(18).push([(65.5,84.5)]).rect(5,11,mode='s').finalize().extrude(30)).union(w0.sketch().segment((-4,24),(11,1)).segment((8,1)).segment((8,-33)).segment((84,-33)).segment((84,1)).segment((64,1)).segment((34,48)).close().assemble().finalize().extrude(30)).union(w1.workplane(offset=81/2).moveTo(-17,-46).cylinder(81,38))