direct faus hluav taws xob cable yuav khiav hauv conduits. direct faus cable feem ntau yog hais txog kev tso cov cables ncaj qha hauv av, tab sis tuaj yeem tiv thaiv tau siv cov kav dej hauv cov chaw tshwj xeeb. Piv txwv li, cov kav dej tuaj yeem siv tau los tiv thaiv thaum cov xaim faus ncaj qha hla ntawm cov phab ntsa hauv lub hauv paus lossis xav tau hla txoj kev uas lawv yuav raug cuam tshuam rau sab nraud.
Cov txheej txheem tso ntawm cov hluav taws xob faus ncaj qha suav nrog kev faus ncaj qha hauv av thiab siv cov kav dej tiv thaiv hauv thaj chaw tshwj xeeb. Qhov zoo ntawm txoj hlua khi ncaj nraim yog nws yooj yim rau nteg thiab txuag cov ntaub ntawv thiab kev ua haujlwm, tab sis nws qhov tsis zoo yog qhov tsis yooj yim rau kev tswj hwm vim nws yuav tsum tau khawb cov av npog rau kev tu. Thaum siv cov hluav taws xob hluav taws xob ncaj qha, cov xuab zeb cushion txheej feem ntau yog muab tso rau hauv qab ntawm lub trench, thiab ib txheej ntawm cib los yog pob zeb slab yog npog saum lub cable rau kev tiv thaiv.
Cov kauj ruam tshwj xeeb rau kev tso cov hluav taws xob hluav taws xob ncaj qha suav nrog kev khawb trenches, tso cov xuab zeb cushion txheej, nteg cables, refilling nrog xuab zeb, thiab npog lub cable nrog ib txheej tiv thaiv. Rau cov cheeb tsam uas yuav raug cuam tshuam rau sab nraud tseem ceeb, xws li cov neeg hla txoj kev, yuav tsum siv cov kev tiv thaiv xws li cov kav dej steel.
