Conventional friction force microscopes (FFMs). where micro cantilever probes are used. have a disadvantage that the accurate quantification of friction force has not been established yet. This comes from the difficulty of measurement of the probe torsion angle. https://qpituzo7kj8o.timeblog.net/70682802/mindfulness-or-relaxation-what-is-more-effective-for-work-stress-literature-review