div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentc-k-instrument-hong-kong-rpm-measurement-a-testo-470-the-idea-combinationhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: C K Instrument Hong Kong Limitedcnkgroupcomcatalog470pdf · Rpm measurement — testo 470 The idea combination of optical and mechanica rpm measure- ment An op ical measurement loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsinreader033viewer20220505135f9d21efaef1d11dcf3abb11html5thumbnails1jpg width=140 height=200 divdiv