理学 3D打印中的几何计算 释 fused deposition modeling; FDM 支撑结构的计算与优化 熔融沉积式打印机（fused deposition modeling，FDM）由于价格低廉、操作简单而具有较高的普及程度。但其最大的缺点是无法直接打印模型中的悬空部位。这时往往需要用户在切片之前给悬空部分添加支撑结构，将支撑结构连同模型一起被打印，并在结束后人为去除。
网络与数据通信 协议体系与组成结构 释文 frequency division multiplexing, FDM 频分多路复用
- prevention and treatment of biological diseases of cultural relics
- prevention and treatment of caries
- prevention and treatment of common diseases of women
- prevention and treatment of heavy metal pollution
- prevention and treatment of mine geology disaster
- prevention and treatment of periodontal disease
- prevention and treatment of sports injury
- prevention before the occurrence of a disease
- prevention for the military trainingrelatedinjury
- prevention of bird damage and animal invasion in civil airports
- prevention of burn injury
- prevention of congenital malformation
- prevention of crime
- prevention of cruelty to animals Law
- prevention of fishery invasive species
- prevention of malocclusion
- prevention of mental disease
- prevention of mental disorder
- prevention of mother-to-child transmission of HBV
- prevention of mother-to-child transmission of HIV/AIDS
- prevention of mother-to-child transmission of syphilis
- prevention of nuclear weapon proliferation
- prevention of organizational conflict
- prevention of secondary salinization in greenhouse
- prevention of the recrudescence of disease