Rau kev txhim kho ruaj khov ntawm kev sib kis thiab kev xa tawm, qhov tunnels thiab cov kav dej thiab lwm lub sijhawm.
Rau qhov xwm txheej tsis yuav tsum tau dais sab nraud mechanical quab yuam.
Direct faus nyob rau hauv dawb-draining av tej yam kev mob rau tsau nyob rau hauv tsev thiab sab nraum zoov installation.
SWA armor thiab lub tsho tiv thaiv dej ruaj khov ua rau lawv haum rau siv sab hauv thiab sab nraud cov tsev lossis rau kev faus ncaj qha rau hauv av.