tender for helical spring for bolster outer suspension arrangement of vvn-h1 to drg. no.bg-rites ltd.-rsd-6410-080, alt. 2, item no. 1, material conforming to rdso spec. no.- wd-01-hls-1994, (rev. 3 of jan.-2009) read to all amendment with latest amendment no. 3 of august- 2019.
