GB/T 5310-2017 20g, 20mng, 25mng, etc.
Mtengo wa ASME SA106 B, Gr. C
Mtengo wa ASME SA210 A1, Gr. C
ASME SA 213 T11, T12, T22, etc
ASME SA 335 P11, P12, P22, etc
Machubu achitsulo osasunthika a ma boiler othamanga kwambiri
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