import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,87,0))
w1=cq.Workplane('ZX',origin=(0,94,0))
r=w0.sketch().segment((-73,-100),(-17,-100)).arc((-19,-86),(-17,-72)).segment((-73,-72)).close().assemble().finalize().extrude(-181).union(w0.workplane(offset=-163/2).moveTo(0,18).cylinder(163,43)).union(w1.workplane(offset=-36/2).moveTo(0,18).cylinder(36,82))