are spring biased by springs怎么译

X  are spring biased by springs
springs在原句中是弹簧。这里的spring biased怎么译呢？
谢谢先

spring biased valve弹簧加载的阀

参考金山词霸：
biasing spring
偏动簧片

由弹簧对x弹性偏置

X是用于弹簧位移的弹簧
？

spring biased
即Spring loaded:
A device held in place, or under pressure from a spring or springs.
参见:http://www.motorera.com/dictionary/SP.HTM#Spring-loaded

试译：
X are spring biased by springs
X为由簧片组形成偏动的簧片。

dinghy321 翻译正确。原文即are spring-biased by springs，两个spring 的意思不同。

谢谢楼上几位的热心解答。