I am wwondering what a certain parts of the drawing mean. For example in the picture below, what mens 24x in front of the some dimensions? In the down-right corner, what are numbers 0.1 and 0.05 for and M within the circle?
The Feature Control Frame (rectangular box) contain the geometric characteristics symbol, and the form, runout or location tolerance. You can find more information on this PDF. The M within a circle stand for Maximum Material Condition (MMC)
"24x" means that the description is true for the 24 pins of the part.