薄壁无缝管
薄壁无缝管-
金属波纹管是由薄壁无缝管制成的。在格子布或条纹布上排料时，缝线必须对格对条。
A metallic bellows is made from a thin seamless tube . When pattern pieces are laid out on plaids or stripes they must be matched at the seam line and corresponding crossmarks .
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超高强钢及轻型薄壁气瓶用无缝管的研制
Development of extra-strength steel and seamless tubes for making of light , thin walled gas vessels