Conversance with mechanism drawing and designing tool and fixture, to be familiar with manufacture process, good communication skill, fluent English with writing and reading.
Be familiar with the process and requirement of the stitchwork, have the skill of process design of production line, be familiar with the performance of universal sewing machine.
But in order to do this, he must have been thoroughly familiar with the enormous madrepore of the sewer in all its ramifications and in all its openings.