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  • 欧美成人精品第一区二区三区,精品国产黑色丝袜高跟鞋,狠狠躁日日躁夜夜躁2022麻豆,亚洲熟妇另类久久久久久

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    Fluid tube

    Fluid tube

    "standard

    GB/T 8163 China National Standard

    ASTM A53M American Materials and Testing Association Standard

    ASTM A106M American Materials and Testing Association Standard

    JIS G 3454 JIS G 3455 JIS G 3456 Japanese Industrial Standard

    "use

    For oil, natural gas and other fluid transport

    》Production specifications and materials

    Specifications: 20--356×4--70

    Material: 10, 20, Q345 (A, B, C, D, E), etc.

    》Steel pipe manufacturing method:

    Hot rolled or cold drawn (rolled).

    "delivery status:

    1. Hot-rolled steel pipes should be delivered in hot-rolled or heat-treated state. When a heat treatment condition is required for delivery, it should be stated in the contract.

    2. Cold-drawn (rolled) steel pipes shall be delivered in a heat-treated condition. According to the requirements of the buyer, the supplier and the buyer negotiate and indicate in the contract that they can also be delivered in cold rolled (rolled) condition.


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