所有科技知识-科学时代

科学时代收录了3405121条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

back engagement of the cutting edge	backer	Backer-Grøndahl, Agathe	Backergunge (Bakarganj)	Backer-Just rate equation
Back, Ernst Emil Alexander	backer pump	backer rod	backer's map	Backer sodium process
back etching process	backet dredger	back-extract	back extraction	back extraction method
back face dry	back facet monitor	back-facing camera	back fat	backfat
backfat probe	backfat thickness	back feed	backfeed	back feed{=BF}
back feed factor	back feed material	back feed phase	backfeed safeguard	back fender
back file	backfile conversion	back fill	back-fill	backfill
backfill blade	backfill compaction	backfill concrete	back-filled fabric	back-filled finish
back filler	backfiller	back fillet	Backfill Grouting	backfill grouting
backfilling	back-filling	back filling	back-filling machine	back filling mangle
backfilling material	backfilling stone	back-filling tamper	backfill material	backfill protection
back fill tamper	backfill tamper	backfill with construction waste	back finishing machine	back-fire
Back fire	back fire	backfire	backfire antenna	back-fire screen
Back firing	back firing	back firing {oil engine}; back water {paddle}; tempering	backfitting	back flame
back flash	backflash	back flash arrester	back flashover	backflling
backflow	back flow	backflow connection	backflow cross connection	backflow preventer
backflow-prevention device	back flush	backflush	backflush chromatogram	backflush costing
back flushing	backflushing	back-flushing lubricating oil filter	back focal distance	back focal length
back focal length{=BFL}	back focal point	back focus	back focus distance	backfolding
back force	back form	back formation play	back frame	back freight
back freight; return freight	back full	backfurrow	back gate bias	backgate bias
back gate transconductance	back gauge	back-gauge	back gear	back gear ratio
back girt，back gird	back grey	back grey guide	back grey roller	back grey washing plant
back grind	back grinding	backgroud counting rate	background	back ground
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