Loaʻa iā Tianjin Rainbow Steel Group nā lako hana hoʻokumu anu piha, punching a me ka wili a me ka hui limahana akamai. ʻO nā huahana i loko e komo pū me nā paila kumu lā WF maʻamau ASTM, nā paila lepo C/U-ʻano anu, nā ala kākoʻo, a me nā paipu huinaha torque/paipu poepoe no nā mea hahai lā a me nā ʻāpana ʻokoʻa tamping a me ka wili. Hoʻohana nui ʻia nā huahana i ka ʻōnaehana hoʻopaʻa PV honua, ka ʻōnaehana tracker slar, ka ʻōnaehana hoʻopaʻa lā lawaiʻa a me nā hale ʻōmaʻomaʻo mahiʻai PV, a pēlā aku.