import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-11,0))
w1=cq.Workplane('ZX',origin=(0,-14,0))
r=w0.sketch().segment((-45,-42),(-41,-42)).segment((-41,-21)).arc((-36,-15),(-41,-8)).segment((-41,13)).segment((-45,13)).segment((-45,-8)).arc((-50,-15),(-45,-21)).close().assemble().push([(29.5,-12)]).rect(41,12).finalize().extrude(-36).union(w0.workplane(offset=20/2).moveTo(6,36.5).box(2,11,20)).union(w1.sketch().push([(0,-1)]).circle(16).circle(11,mode='s').finalize().extrude(62))