Tata ki te 30 ra ki muri, ko tetahi o a maatau kaihoko kei rotoVietnami whakahauhia he puranga ospereti tiera. Ko te rauemiASTM A572 GR.50.

Hei kaihanga ngaio o nga flanges, paipa paipa, paipa me etahi atu hua paipa, ka taea e Hunan Great te whakaputa momo momo paipa. Mena he hiahia koe, tena koa whakapiri mai ki a maatau.