flat jack

• 扁千斤顶,测量岩压水力囊

flat jack的用法和样例：

例句

1. Freyssinet flat jacks may be required to compensate for distortions arising from creep and shrinkage.
   弗涅新奈氏扁千斤顶可用以调整收缩与徐变产生的变形。