"Reciprocal opening rate" This test indicator means that in the same batch of locks, a certain number of locks are opened to each other within a specified time. The percentage of the number of times that the number of open locks is the total number of open trials is to check the performance of a lock. An important indicator of good or bad, the item has 17 batches of products that are unqualified. The number of different teeth of the key is based on the number of marble holes and the length of the round head (that is, the number of rounds of the round head) to form a number of different numbers of teeth. The three batches of the product are unqualified. The spot check found that the “Stanley†aluminum alloy door lock produced by Stanley Technology (Shenzhen) Co., Ltd., the “Yazi†mortise lock produced by Shanghai Yazi Lock Co., Ltd., is nominally known as Xiaolan, Zhongshan City. The "AMG" door lock produced by Zhenbao Hardware Products Factory, the number of different teeth and the mutual opening rate of the key are unqualified.
In addition, individual products "square tongue end static load", "lock tongue extension length", "handle axial static tension", "cylinder torque", "lock ring safety device" items failed. During the monitoring, it was found that a batch of “GIANT†bicycle locks and lock ring fuses produced by the nominal giant (China) Co., Ltd. failed. A batch of "AOSHITE" mortise door lock handles produced by China Strong Group Co., Ltd. failed to pass the axial static tension project.
In the fourth quarter of 2009, Shanghai lock products quality supervision and inspection of unqualified products
Source: China Quality News Network
A pipette, also known as a pipette gun, is a device used to quantitatively transfer liquids. When conducting research in analytical testing, a small or trace amount of liquid is generally removed with a pipette. Pipettes can be divided into gas piston pipettes (Air-displacement pipette) and external piston pipettes (Positive-displacement pipette) according to the principle. Gas piston pipettes are mainly used for standard pipetting, and external piston pipettes are mainly used to handle special liquids such as volatile, corrosive and viscous. Many people ignore the correct use of pipettes and some of the details.
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