Conch Cement 1. There are 4 words "green product" above the paper bag. The sealing edge of the seal is closed in a circle. If it is 2 pieces of paper edge, it means that the package has been opened. 2. There are factory sites and telephones under the paper bags. None of them recycle the old bags for JS and then shrink them. 3. Tear the outer paper bag, the inner lining is a black nylon bag, if it is other colors or there is no lining, there will be no doubt. Take the example of the most used brand cement for members. The weight of the first cement is definitely not less than 98 pounds. The second cement factory in Shanghai cement has never set up a branch factory (some merchants say that his brand of cement is produced by the factory). The third PS 32.5 is a green package and the PO 42.5 is a red package. The fourth bag counter bag maker’s phone and bag production date is full, such as July 31, 2010. The fifth cement production date is also full, and the stamp is knocked on. The font color and its material are black ink. The sixth one is very important. The seals on both sides of the bag are two lines, and the lines are the same. Seventh, there are also the stamps of the production date numbers of the brand-name cement, which are not fixed at the front and back of the bag, sometimes on the front side and sometimes on the reverse side. link: Calculation of the amount of cement used to decorate the ground yellow sand Shangcun video lectures cement yellow sand Huangsha Cement purchase entrance decoration restaurant decoration cement 