Novel coronavirus pneumonia outbreak since the outbreak, China has taken effective measures to prevent the spread of the epidemic, and promote the resumption of work and orderly production. The abil
PS is polystyrene, and hips is modified polystyrene, that is, hips is a kind of ps plastic modified by ps material, which is also ps material in nature, but modified in impact resistance. Impact-res
The PVC material itself is not toxic. If it is not fully polymerized monomers or degradation products, it contains certain toxicity. Under high temperature and ultraviolet radiation, polyvinyl chlor
Source: Shandong Provincial Health Committee
From 12:00 to 24:00 on March 2, 2020, there were no suspected cases of new coronary pneumonia
