Maintenance-free, low noise, constantlength and abrasion resistance, just to mention a few of the advantages responsible for the success of our timing belts worldwide.
免维护，低噪声，恒定的长度和耐磨性，只提几点优点的成功负责全球同步带。
2
The continuous character of this model justifies the expressions' cyclical fluctuations' and 'business cycle' although the movements have neither constant duration nor constantlength.
该模型的连续性证明的表达式“周期性波动”和“商业周期”，虽然动作既不恒定的持续时间也不恒定的长度。
3
One kind of simple and constantlength distributed chromosome is proposed to substitute the complex and variable length tree structure chromosome for a particular kind of genetic programming problem.