foothold,footstep是什么意思

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用法例句

The technological characteristics of the foot plastics were analyzed.

分析了脚踏塑件的工艺特点,介绍了成型该塑件的注射模结构设计及一种嵌件定位的机构,阐述了该模具的工作过程。

A pedal braking system is devised by investigation and study.

电机车的制动系统是否可靠 ,直接影响生产效益 ,通过调查研究设计出的电机车脚踏制动系统有着广泛的使用推广价值。

Speed control of FES cycling with motor assist;

FES脚踏车电机辅助系统的速度控制

A touring bicycle was developed, five seats distributed equality on a circle, several person combinations at discretion can also ride the bicycle.

研制的观光脚踏车五个座位均匀分布在圆周上,任意几人组合都可以乘骑。

Based on the experience that in bicycle riding,only the front semi-circle of a crank bears the force,two guide bars are to be used to enlarge the driving moment of the front semi-circle in a new design.

根据脚踏车骑行时只是曲柄的前半圆周用力而半圆周不用力的特点 ,采用两副导杆传动机构将前半圆周的驱动力矩放大 ,从而达到省力的目的。