Qhov zoo 1. Lub teeb: Qhov ntom ntawm cov lo ntsiab muag dav dav yog 0.83-1.5, thaum lub iav kho qhov muag yog 2.27 ~ 5.95.2. muaj zog cuam tshuam tsis kam: Qhov cuam tshuam tsis kam ntawm resin lens feem ntau yog 8 ~ 10kg / cm2, yog ob peb zaug ntawm iav, yog li nws tsis yooj yim rau tawg, nyab xeeb thiab ruaj khov.3. Lub teeb kis tau zoo...
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