For the special flanged head at reducer section on shells, the plan shall depend on the fabrication capacity of plants.
对于壳体上的特殊变径段折边封头，应视工厂加工能力采用相应方案。
For the special flanged head at reducer section on shells, the plan shall depend on the fabrication capacity of plants.
对于壳体上的特殊变径段折边封头，应视工厂加工能力采用相应方案。
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