So the next time you sew with a metal needle or cast a hook with a rod and reel, or the next time you use an adjustable wrench or open the gate on a chain link fence, or the next time you travel in an automobile or plow straight furrows in a field, think of the extraordinary blend of iron and carbon that makes it possible.
[ ಪಾದಟಿಪ್ಪಣಿಗಳು] ಸ್ಫಟಿಕವು ಒಂದು ಘಟಕದ ಅಂಶ ಅಥವಾ ಅದರ ಘನಸ್ಥಿತಿಯಲ್ಲಿರುವ ಸಂಯೋಜನೆಯಾಗಿದೆ.