The card is sealed, and may itself constitute a practical device, such as a vane, shaker, stirrer, lever, pusher or sonicator for direct contact with a solid or immersion in a fluid, or may be bonded by a stiff adhesive to make a surface to surface {HEAD ~ mechanical coupling} with a solid workpiece, device, {TAIL ~ substrate machine} or sample 
The card is sealed , and may itself constitute a practical device , such as a vane , shaker , stirrer , lever , pusher or sonicator for direct contact with a solid or immersion in a fluid , or may be bonded by a stiff adhesive to make a surface to surface { HEAD ~ mechanical coupling } with a solid workpiece , device , { TAIL ~ substrate machine } or sample
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