import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-2))
r=w0.sketch().segment((-50,3),(-20,-27)).segment((-19,-27)).segment((-19,-39)).segment((-14,-39)).segment((-12,-37)).segment((-10,-39)).segment((37,-39)).segment((37,23)).segment((2,23)).segment((-14,39)).close().assemble().finalize().extrude(-30).union(w0.sketch().push([(-9,4)]).circle(10).reset().face(w0.sketch().arc((-2,7),(-17,3),(-1,2)).arc((-1,5),(-2,7)).assemble(),mode='s').finalize().extrude(10)).union(w0.sketch().push([(26,6)]).circle(24).push([(26.5,6)]).rect(41,20,mode='s').finalize().extrude(34))