ページの作成:「The second factor is the width. The width is measured in 'Microns' (micrometres) which equals one thousandth of a millimetre (mm). Fine fibres can turn out to be as low a…」
(ページの作成:「The second factor is the width. The width is measured in 'Microns' (micrometres) which equals one thousandth of a millimetre (mm). Fine fibres can turn out to be as low a…」)