Major hazard installation
major hazard installation control
major hazard installation of hazardous chemicals
information management of major hazard installatio
bridge installation instruction
filter installation instruction
installation instruction
Institution institution
hazard prevention and hazard reduction
one-address instruction; single address instruction
Oral instruction; Oral teaching; Verbal instruction
Oral teaching; Oral instruction; Verbal instruction
Verbal instruction; Oral instruction; Oral teaching
(average)F-hazard affected degree
abrupt geological hazard
accident of occupational hazard