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Doorknob of guard against theft of choose and buy grasps 3 point
From;  Author:Stand originally

Near future market research discovers, new mandatory national level " exit of guard against theft is general technical condition " since carrying out, door of old standard guard against theft still has carry out in the market. For this, shanxi saves consumer society to warn customer, 3 points should grasp when door of guard against theft of choose and buy, lest be deceived.
Above all, the door of guard against theft that should understand qualification uses three azimuth lock to decide commonly, not only door lock lock is decided, fluctuation rail can insert a lock to decide, face each other tries to secure. Inferior goods is general
Do not have three position the lock is decided or free three azimuth lock decides a structure. Should special attention checks door of guard against theft to have without weld defects, of fan of guard the entrance and doorcase cooperate whether close-grained, clearance whether even consistent, open is agile etc.

Next, the exit of guard against theft that should examine operator to offer examines report, examine to should accord with new GB as a result. New GB the level of safety of guard against theft door of guard against theft by class of original C, B, A3, instead armour, second, third, fourth 4 class, corresponding phonetic alphabet code name is J, Y, B, D respectively, first class is the superlative degree, ordinal and degressive. New GB still increased to be able to help the content of true bogus of door of consumer identifying guard against theft, ask to produce manufacturer to be in namely hinge of inside of door of guard against theft (hinge) of the horn on the edge locally, set the permanent fixed number that Song Tiao imprints. If do not have this mark, it is rejected product.

Finally, want to distinguish the distinction of door of guard against theft and metallic door. Operator should let say in trade name the column is made clear when ordering goods " door of guard against theft " , in case illegal operator uses steeliness door, defend the door, door that prevent prize, armor door pretend to be door of guard against theft; Before installation, should check objective and order goods sample is same; Remember asking for even finally guarantee the receipt such as card, bill, so that appear,seasonable thought fors the time being after the problem.