import cadquery as cq
w0=cq.Workplane('YZ',origin=(48,0,0))
w1=cq.Workplane('XY',origin=(0,0,30))
r=w0.sketch().push([(0,-18)]).rect(88,50).reset().face(w0.sketch().segment((-19,-32),(0,-42)).segment((19,-3)).segment((0,6)).close().assemble(),mode='s').finalize().extrude(-11).union(w0.sketch().arc((-13,37),(-9,39),(-8,43)).close().assemble().finalize().extrude(2)).union(w1.workplane(offset=-15/2).moveTo(-30,-10).cylinder(15,20))