Peb cov chaw tsim khoom zoo thiab kev tswj hwm zoo tshaj plaws thoob plaws txhua theem ntawm kev tsim ua rau peb lav tag nrho cov neeg yuav khoom txaus siab rau Tus Nqi Tshwj Xeeb rau Tuam Tshoj Underground buried Al Detectable Caution Ceeb Toom Factory Barricade Barrier Flagging Danger PE Marking Safety Reflective Hazard Tape, peb cov khoom muag muaj koob meej superior los ntawm tag nrho lub ntiaj teb no raws li nws cov nqi sib tw tshaj plaws thiab peb qhov zoo tshaj plaws ntawm kev pab cuam tom qab muag rau cov neeg siv khoom.
Peb cov chaw tsim khoom zoo thiab kev tswj hwm zoo heev thoob plaws txhua theem ntawm kev tsim ua rau peb lav tag nrho cov neeg yuav khoom txaus siab rauTuam Tshoj ceeb toom daim kab xev, Detectable Daim kab xev, Peb ua tib zoo saib xyuas cov neeg siv khoom, thiab saib xyuas txhua tus neeg siv khoom.Tam sim no peb tau tuav lub koob npe nrov hauv kev lag luam rau ntau xyoo.Peb muaj kev ncaj ncees thiab ua haujlwm rau kev tsim kom muaj kev sib raug zoo nrog peb cov neeg siv khoom.