For a few isolated purposes, however, it is desirable to use a glass which has not been touched upon either surface and thus preserves the lustre of its fire polish undiminished; this can be attained in crown-glass but not in sheet, since one side of the latter is always more or less marked by t
undiminished הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד