kashew Sep 17, 2013:

@ asker Lots of options: in English documents one would often have ***test piece*** instead of strain body.

imeneinstein (asker) Sep 17, 2013:

this is another explanation However, in the conventional load detecting apparatus described above, a load is applied or acts in a direction parallel to the axis C of the strain body 1. Thus, the strain body 1 itself resists to deformation by the load, thereby making strain less likely to occur in the circumferential direction strain detecting elements 2 and the width direction strain detecting elements 3, so that sensitivity of the output signals is lowered. Also, a direction of the load applied to the main sensor unit cannot be detected, which limits application of the load detecting apparatus.