1.Basic PPE requirements-hardhat, steel toe shoes, safety glasses, hi-vizvest,
基本PPE要求--安全帽,钢头安全鞋,安全眼镜,反光背心.
2.A convenient synthesis of triphenylmethyl ether was studied via the reaction of triphenylmethyl carbinol and alcohol, using PPE as dehydrating agent. \;