It is applicable in the measurement of heat seal strength, the quality of heat seal, the burst pressure and the seal-leakage character of each heat seal edges of the flexible packages that are made using various kinds of heat seal technics; the measurements of leak characters for all kinds of plastic pilfer proof closures; the measurements of the unitary airproof character, compression resistance strength, cap body joint strength, cap disengaging strength, seal strength of edge, butting strength of various flexible tubes; Simultaneous, it can also provide evaluating and analyzing for the compression and burst resistance strength of the materials of flexible packaging bags, the torsional airproof index of cap, the cap joint and disengaging strength, the stress strength; as well as the airproof character, the compression resistance character, the burst resistance character of unitary bottle, and so on.