Abstract: Disclosed is a device for sensing atmosphere temperature in a vehicle brake, the device including a space formed in a brake lining, the space being open toward a drum, a through-hole formed through a brake shoe, a case fitted in the through-hole, the case being fixed to the through-hole by a plurality of fixing means, an insertion recess formed in the case, the insertion recess being formed so as to be open to the rear, an aeration hole formed in a front end of the case, the aeration hole being configured to allow the space and the insertion recess to be connected to each other such that aeration is performed therebetween, a temperature sensor fitted in the insertion recess, the temperature sensor being configured to measure frictional braking temperature transferred to the space, and a fixing member configured to fix the temperature sensor.

Abstract: A grinding wheel includes a plurality of wheel tips. The plurality of wheel tips include a plurality of diamond abrasive grains and a bonding material mixed with the diamond abrasive grains. The plurality of diamond abrasive grains have a ratio of a length in a long axis direction to a width in a short axis direction of 1:2.5 to 1:3.5 and includes edges or vertices having a grinding angle of 90° or less.

Abstract: A grinding wheel includes a plurality of wheel tips. The plurality of wheel tips include a plurality of diamond abrasive grains and a bonding material mixed with the diamond abrasive grains. The plurality of diamond abrasive grains have a ratio of a length in a long axis direction to a width in a short axis direction of 1:2.5 to 1:3.5 and includes edges or vertices having a grinding angle of 90° or less.