import cadquery as cq
w0=cq.Workplane('YZ',origin=(-16,0,0))
w1=cq.Workplane('ZX',origin=(0,-4,0))
r=w0.sketch().segment((-50,-2),(10,-2)).segment((10,39)).segment((-12,39)).segment((-12,21)).segment((-17,21)).arc((-31,8),(-50,6)).close().assemble().push([(-3,12)]).circle(12,mode='s').finalize().extrude(24).union(w0.sketch().push([(23,-19)]).circle(27).push([(42,-6)]).circle(1,mode='s').finalize().extrude(38)).union(w0.workplane(offset=55/2).moveTo(24,16).box(14,60,55)).union(w1.workplane(offset=-14/2).moveTo(-13,-30).cylinder(14,9))