Food and Drug Administration (Drugs and Drugs Supervision Bureaus) of provinces, autonomous regions, and municipalities directly under the Central Government:
In order to further improve the level of inspection equipment for health foods and cosmetics inspection agencies and ensure the supervision of health foods and cosmetics, combined with the current status of food and drug supervision and management system health food and cosmetics inspection organization equipment, the State Bureau has formulated a The Basic Standards for Food and Drug Supervision and Management Systems for Health Food Inspection Organizations (2011-2015) and the Basic Standards for Equipment for Cosmetics Inspection of Food and Drug Supervision and Management Systems (2011-2015) are hereby issued and are for implementation.
State Food and Drug Administration
October 11, 2010
The down-the-hole hammer (pneumatic impactor) cooperates with the drilling rig and the corresponding drilling tools to perform the impact rotary drilling. The DTH hammer is connected to the bottom end of the drill pipe, the drilling rig drives the drill pipe to rotate, and the compressed air (compressed air) enters the DTH hammer through the drill pipe to generate a certain frequency of impact force to break the rock, and at the same time use the exhaust gas to compress the hammer. The head (drill) is cooled, and the chipped cuttings are discharged out of the hole. Because the outer diameter of the down-the-hole hammer is smaller than the diameter of the drill hole, it can go down into the hole with the deepening of the drill hole (the name of the down-the-hole hammer comes from this).
Dth Hammers ,Dth Hammer Drilling,Dth Drilling,Dth Drill Bits
Gansu Lanzhou and Wuwei International Land Port Management and Operation Co.Ltd. , https://www.gslwyygs.com