A.7.6mm和6.8mm B.8.0mm和7.8mm C.7.8mm和7.7mm D.7.5mm和7.0mm
A.3.6△BU B.3.6△BD C.5.4△BD D.5.4BU
A.3.8△B161° B.3.8△B231° C.3.8B71° D.3.8△B301°