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塑料型材
以塑料为原料加上一定比例的稳定剂、着色剂、填充剂、紫外线吸收剂等,经成型工艺制得的具有一定几何形状的塑料制品。
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safety of hot work in long-distance pipeline
safety of hydrogen systems
safety of microbial application
safety of missile
safety of molding and core making
safety of monoclonal antibody
safety of nuclear power plant
safety of nuclear weapon
safety of oil and gas pipeline emergency repair
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safety of oil and gas testing
safety of oil production downhole operation
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safety of special equipment supervision and management
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safety of transgenic medicinal resourses
safety of wood planer
safety of woodworking machinery
safety operation of civil engineering system
safety operation of crane
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