Fun boṣewa ASTM, ohun elo oriṣiriṣi pẹlu iwọn irin oriṣiriṣi, ni afikun, awọn ohun-ini ẹrọ wọn ati akopọ kemikali, awọn ohun-ini irin jẹ gbogbo yatọ. Atokọ wa fun boṣewa asm pẹlu iwọn irin oriṣiriṣi. ASTM A53 / A53M Standard Specification fun Pipe, Irin, Bla...
Ka siwaju