What does that mean, a stiff spring?

这说明了什么，一个硬弹簧？

youdao

The multifinger caliper tool string to be used for casing inspection was centralized using the combination of a strong, optimally placed, spring loaded roller and stiff arm centralizers.

用于检查套管尺寸的多触点井径测量工具管串，采用结实的、安放位置经过优化的、弹簧加载的滚子及刚性臂扶正器进行居中。

youdao

As I noted last week, the combination of stiff RIMM and HTC warnings is a possible sign of European handset market weakening notably during the spring.

FORBES: Silent Spring - What the Handset Warning Cluster Means