However, some minor irregularities are nearly unavoidable in the manufacture of rubber goods, and these imperfections may be present in the insulating materials without significantly affecting the insulation.
(some minor irregularities; are; nearly unavoidable in the manufacture of rubber goods) (these imperfections; may be; present in the insulating materials)
some minor irregularities these imperfections
are may be
nearly unavoidable in the manufacture of rubber goods
present in the insulating materials