optical-fiber preform

• 光纤预制棒

optical-fiber preform的用法和样例：

例句

1. And the manufacture of optical fiber preform manufacturing has been the expansion of production capacity of Chinese enterprises and cost control of the main bottlenecks.
   而光纤预制棒制造的制造一直是我国企业产能扩张及成本控制的主要瓶颈。