After the steel tubes are rolled, automatic submerged arc welding is used to repair the joints. Before forming, the steel strip is leveled, trimmed, edged, surface cleaned and pre-trimmed. Pre-bending and sizing are the main steps in the spiral tube […]
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The ability of the steel pipe to withstand pressure is strong
Jueves, agosto 19, 2021Tags: China Wholesale PPGI PAINT
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