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无砟道床
释义
无砟道床
Encyclopedia
工学
道床结构
释
ballastless track
无砟道床
不用道砟铺设的道床。又称整体道床,是相对于有砟道床而言的。通常以钢筋(或沥青)混凝土取代传统的道砟作为道床材料。钢筋混凝土可以在现场浇筑,也可采用预制件,或者两者相结合。无砟道床适用于坚实基础,如隧道、桥梁和经过加强处理的土质路基。
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positron-emission tomography
positron emission tomography-computed tomography
positron emission tomography/computed tomography
positron emission tomography-computed tomography (PET/CT)
positron emission tomography-computed tomography,PET/CT
positron emission tomography/magnetic resonance imaging
positron emission tomography-magnetic resonance imaging,PET/MRI
positron emission tomography (PET)
positron emission tomography, PET
positron-emission tomography, PET
positron emission tomography pharmaceutical
positron gun
positronium
positronium chemistry
positronium production
POSIX threads programming interface
POS machine
posology
Pospišil
POSS
Posse
possessed by the devil
possession
possibility
possibility of anticipating legal conduct
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