safesn.保险箱（safe的复数）；钱盒safeadj.安全的；安然无恙的；可靠的；谨慎的n.保险箱safe density window安全密度窗口safe custody charge保管费safe transportation安全运输safely power margin安全功率裕量safe operating area安全工坐,安全运转区域safe exposure level安全曝光水平Safe feed additives无公害饲料添加剂safe sight distance安全视距,可靠视距safe area generator画框发生器Safe flexible joint安全柔性关节