Shock Absorber Cord减震绳
Shock absorber cord is made from natural rubber strands encased in a braided cover of woven cotton cords treated to resist oxidation and wear. Great tension and elongation are obtained by weaving the jacket upon the bundle of rubber strands while they are stretched about three times their original length.
减震绳由天然橡胶线束制成，包裹在经过抗氧化和抗磨损处理的棉绳编织外层中。通过在橡胶线束上编织外套，可获得极大的张力和伸长率，而橡胶束的拉伸长度约为其原始长度的三倍。
There are two types of elastic shock absorbing cord. Type I is a straight cord, and type II is a continuous ring, known as a “bungee.” The advantages of the type II cord are that it is easily and quickly replaced and does not need to be secured by stretching and whipping. Shock cord is available in standard diameters from 1/4 inch to 13/16 inch.
弹性减震绳有两种类型。I 型是一条直绳，II 型是一个连续的环，称为 “蹦极”。II 型绳索的优点是更换方便快捷，不需要通过拉伸和鞭打来固定。减震绳的标准直径从 1/4 英寸到 13/16 英寸不等。
Three colored threads are braided into the outer cover for the entire length of the cord. Two of these threads are of the same color and represent the year of manufacture; the third thread, a different color, represents the quarter of the year in which the cord was made. The code covers a 5-year period and then repeats itself. This makes it easy to figure forward or backward from the years shown in Figure 5-15.
三根彩线编织在整个绳索的外层。其中两根颜色相同的线代表生产年份；第三根颜色不同的线则代表绳带制作年份的季度。代码覆盖 5 年的时间，然后重复出现。这样就很容易从图 5-15 所示的年份向前或向后进行计算。
Figure 5-15. Shock absorber cord color coding