1. Scarifiers tuaj yeem loosen cov av tawv, permafrost, pob zeb mos, pob zeb huab cua, thiab cov pob zeb txheej nrog cov kab nrib pleb, thiab tseem tuaj yeem tshem cov cag ntoo,
2. Txo cov teeb meem rau kev tsim kho, thiab lwm yam. Thaum ua haujlwm hauv mines lossis quarries, kev sib xyaw ntawm cov av xoob thiab cov thoob tuaj yeem txhim kho kev ua haujlwm zoo.