The more Deere pondered the situation, the more convinced he became that a highly polished steel plowblade-instead of the conventional cast-iron model-could solve the problem.
迪尔越考虑这种情况，就越相信用高度抛光的钢犁片代替传统的铸铁犁片就能解决这个问题。
2
A major invention was the adjustable strut that could precisely set the depth of the plow by altering the distance of the blade and the beam.
一个重大的发明是可调节的支柱，通过改变刀板与横梁的距离来精确地设置犁的深度。
3
A major invention was the adjustable strut which, by altering the distance of the blade and the beam, could precisely set the depth of the plow.