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E355 (EN10305-1) HONED TUBE
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GB/T3639 SEAMLESS STEEL PIPE
GOST 8731 SEAMLESS STEEL PIPE
GOST4543 SEAMLESS STEEL PIPE
H8 (EN ISO 286-2) HONED TUBE
E355, ST52, CK45, 4140, SCM440,16MN 42CRMO HOED TUBE
ASTM A213 STAINLESS STEEL PIPE 304/304L 316/316L GRADE FACTORY
ASTM A312 SEAMLESS STAINLESS STEEL PIPES
ASTM A789 SEAMLESS STAINLESS STEEL PIPES
JIS G 3446 STAINLESS STEEL PIPE
API 5CT CASING PIPE
API 5CT ERW TUBING PIPES