import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-10))
w1=cq.Workplane('XY',origin=(0,0,-30))
r=w0.sketch().segment((-18,-38),(15,-38)).segment((15,-11)).arc((29,11),(7,-4)).segment((-18,-4)).close().assemble().push([(-9,32)]).circle(2).finalize().extrude(-19).union(w0.workplane(offset=17/2).moveTo(18,45).cylinder(17,5)).union(w0.sketch().push([(-21,-41)]).rect(22,18).push([(-16.5,-33)]).rect(1,2,mode='s').push([(21,20)]).circle(3).reset().face(w0.sketch().segment((19,18),(20,17)).segment((23,22)).segment((22,22)).close().assemble(),mode='s').finalize().extrude(40)).union(w1.workplane(offset=13/2).moveTo(20,1.5).box(10,1,13))