But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and will give you a complete account of the system and expound the actual teachings of the great explore
对冷却介质无特殊要求，适用于各种机床，肥皂水、苏打水、乳化液、冷却液、切削液、清矿物油没有严重腐蚀性的液体均可适用
