Black steel case, snap - in plastic lens, brass internal, connection and joint.

黑铁壳, 扣入 式 塑面, 铜机芯,铜管子, 铜接头.

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Black steel chrome plating steel ring, plastic lens, brass internal connection and joint.

黑铁壳,电镀铁圈, 塑面, 铜机芯,铜管子,铜接头.

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The technical Know - how of the precision injection moulding of the middle - small size plastic lens is introduced.

介绍 中小型 塑料透镜精密注塑成型的工艺,并以两种塑料透镜的成型为例,讨论了最佳注塑工艺的选择.

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Thetreatment is to remove the clouded lens and replace it with a permanent plastic lens.

其治疗方法是摘除混浊的晶状体,换上永久性的塑料晶状体.

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