iodine a metal_iodine a metal

Taiwan’s labor working environment air pollution allowable concentration standard stipulates that the average allowable concentration of dichloroethyl ether (Dichloroethyl ether) in the workplace for eight hours per day (PEL-TWA) is 5 ppm, 29 mg/m3.

According to customs statistics, in the first four months of this year, the total value of my country’s imports and exports of goods trade was 9.07 trillion yuan, a year-on-year decrease of 4.9%, and the rate of decline narrowed by 1.5 percentage points from the first quarter. Among them, exports were 4.74 trillion yuan, down 6.4%; imports were 4.33 trillion yuan, down 3.2%; the trade surplus was 415.7 billion yuan, down 30.4%.