He was an inventor himself: he invented a moldboard for plows, a swivel chair, a pedometer, a camp stool, and a copying device, among other things.
他是个发明家,他发明了一种耕地的犁、转椅、计步器、马扎、复印设备和其他东西。
He was an inventor himself: he invented a moldboard for plows, a swivel chair, a pedometer, a camp stool, and a copying device, among other things.
他是个发明家,他发明了一种耕地的犁、转椅、计步器、马扎、复印设备和其他东西。
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