worked unprotected_left unfinished

Data/tables/angle_original.csv

@@ -0,0 +1,9 @@
+,inter_no,angle_A1,angle_A2,angle_A3,angle_A4,angle_A5,angle_A6,angle_A7,angle_A8,angle_B1,angle_B2,angle_B3,angle_B4,angle_B5,angle_B6,angle_B7,angle_B8
+0,175,179004,001095,090270,268000,NaN,,,,003176,179270,090180,270090,NaN,,,
+1,176,180000,180000,270356,NaN,NaN,,,,359180,180270,NaN,NaN,NaN,,,
+2,177,180000,000090,stop,268000,NaN,,,,001176,179270,NaN,090180,NaN,,,
+3,178,180000,000090,270000,090270,NaN,,,,000180,180270,270090,090180,NaN,,,
+4,201,180000,270000,090270,090270,000090,,,,180270,270090,270090,090180,000180,,,
+5,202,090270,stop,NaN,NaN,NaN,,,,270090,NaN,NaN,NaN,NaN,,,
+6,206,180000,stop,180000,stop,NaN,,,,000180,NaN,000180,NaN,NaN,,,
+7,210,090270,268000,359090,180000,NaN,,,,NaN,270090,000180,180270,NaN,,,