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derivative substances [produced] from dissolution and precipitation of the implant end material(s)..
Explanation: --- derivative substances [produced] from dissolution and precipitation of the implant end material(s) of the driver
Basically, what this specification wants to say is that the "derivatives" (物) coming from the (presumably metallic) implant should not affect the surrounding chemical environment too much.
Although "precipitation" is usually translated as "沉澱", in this context, it seems more appropriate to call it "析出"... Please refer to the reference links as elsewhere for clarification...
[PDF] 磷酸鈣在動物體內機械性質研究File Format: PDF/Adobe Acrobat
物活性，植入人體後不會引起毒性，不刺激組織，具有引導骨骼向內生 ...... (dissolution)、析出(precipitation)、與相變化(phase transformation)等降解反 ...
etdncku.lib.ncku.edu.tw/ETD-db/ETD-search/getfile?URN=etd-0726104-155902&filename=etd-0726104-155902.pdf - Similar pages - Note this
Biodegradable implant for fracture nonunions - Patent 5492697A biodegradable implant for placement in nonunion bone fractures as a ... comprise the stages of polymer dissolution, polymer precipitation in a nonsolvent, ... www.freepatentsonline.com/5492697.html - 95k - Cached - Similar pages - Note this
Naikei Wong Local time: 10:21 Works in field Native speaker of: English, Chinese PRO pts in category: 8