HS编码：38221900 | 交易描述：Standard gas mixture 5% CO balanced in N2, 10L bottle for calibrating fire alarm systems contained in aluminum bottle. Manufacturer: Chemtron Science Laboratories. 100% new.

HS编码：38221900 | 交易描述：Standard gas mixture 12.5%O2 balanced in N2, 10L bottle for calibrating fire alarm systems contained in aluminum bottle. Manufacturer: Chemtron Science Laboratories Pvt. Ltd. 100% new.

HS编码：28042900000 | 交易描述：CALIBRATION GAS MIXTURE FILLED IN 10 LTR AL CYLINDER WITH BS4 S S VALVE 1.60PMM ACETALDEHYDE/8PPM METHANOL/80 PPB BENZENE BALANCE NITROGEN 1 PACKAGE - BRAND/SUPPLIER-CHEMTRON SCIENCE LABORATORIES

HS编码：8481800000 | 交易描述：CSL; GENERAL S S REGULATOR DOUBLE STAGE; CHEMTRON SCIENCE LABORATORIES PVT LTD; OTHER APPLIANCES FOR PIPES, BOILER SHELLS, TANKS, VATS OR THE LIKE.