div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader042vdocumentsnetreader042viewer20220308025b0b296e7f8b9adc138d65edhtml5page1jpg target=_blank img data-url=-if-two-out-of-round-surfaces-rub-together-in-a-regular-fashion-over-a-period-ofhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: If two out-of-round surfaces rub together in a regular fashion over a period of time the high points will tend to wear down and the surfaces will tend toward surfaces of revolution loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader042vdocumentsnetreader042viewer20220308025b0b296e7f8b9adc138d65edhtml5thumbnails1jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imagea href=https:reader042vdocumentsnetreader042viewer20220308025b0b296e7f8b9adc138d65edhtml5page2jpg target=_blank img 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fashion over a period of time the high points will tend to wear down and the surfaces will tend toward surfaces of revolution loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader042vdocumentsnetreader042viewer20220308025b0b296e7f8b9adc138d65edhtml5thumbnails3jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imagea href=https:reader042vdocumentsnetreader042viewer20220308025b0b296e7f8b9adc138d65edhtml5page4jpg target=_blank img data-url=-if-two-out-of-round-surfaces-rub-together-in-a-regular-fashion-over-a-period-ofhtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: If two out-of-round surfaces rub together in a regular fashion over a period of time the high points will tend to wear down and the surfaces will tend toward surfaces of revolution loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader042vdocumentsnetreader042viewer20220308025b0b296e7f8b9adc138d65edhtml5thumbnails4jpg width=140 height=200 adivdivdiv class=ts-pagebutton class=gotoPage data-page=5Page 5button div class=ts-imagea href=https:reader042vdocumentsnetreader042viewer20220308025b0b296e7f8b9adc138d65edhtml5page5jpg target=_blank img data-url=-if-two-out-of-round-surfaces-rub-together-in-a-regular-fashion-over-a-period-ofhtmlpage=5 data-page=5 class=ts-thumb lazyload alt=Page 5: If two out-of-round surfaces rub together in a regular fashion over a period of time the high points will tend to wear down and the surfaces will tend toward surfaces of revolution loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC 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