 The car numbers of the trains range from x001 to x132 , where x depends on the carriage type . Kawasaki Heavy Industries built sets 001 – 020 , 051 – 062 , and 093 – 102 , Kinki Sharyo co @-@ built sets 021 – 030 , 063 – 072 , and 103 – 112 , Nippon Sharyo co @-@ built sets 031 – 040 , 073 – 082 , and 113 – 122 , and Tokyu Car Corp co @-@ built sets 041 – 050 , 083 – 092 , and 123 – 132 . Individual cars are assigned a four @-@ digit serial number by the rail operator SMRT . A complete six @-@ car trainset consists of an identical twin set of one driving trailer and two motor cars permanently coupled together . For example , set 099 / 100 consists of carriages 3099 , 1099 , 2099 , 2100 , 1100 and 3100 . 
