1. Qhov kev ncua deb ntawm qhov chaw nyob ib puag ncig thiab kev taw qhia ntawm lub kav hlau txais xov board ntawm lub hauv paus chaw nres tsheb;
2. Txawm hais tias muaj kev thaiv thiab txo qis los ntawm cov tsev lossis lwm yam kev cuam tshuam ntawm qhov chaw nres tsheb nyob ib puag ncig thiab qhov chaw;
3. Lub zog xa hluav taws xob ntawm txhua zaus band module ntawm lub xov tooj ntawm tes shielding ntsuas nws tus kheej thiab seb nws yog cov khoom tso tawm li cas;
4. Lub erection qhov siab thiab erection txoj hauj lwm ntawm lub shielding ntsuas ntawm qhov chaw;
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