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ventilator valve spring
释义
ventilator valve spring
通风阀簧
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porphyryl
porpoise
porporino
porridge
Porro-Kopper principle
Porro prism
Porro prism erecting system
Porro system
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port
porta
portabelt
portability
portability of program
portable
portable acetylene generator
portable acidity meter
portable aggregate plant
portable air compressor
portable air painter
portable air pollution analyzer
portable air velocity meter
portable alignment gauge
portable aluminium alloy cabinet
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