cavitiies 后面加百分比是啥意思哦，请教
在加拿大 Currently, we confront more noise issue in Taipan percussion production. Per investigation, we found there is difference between all 4 cavitiies of Mid-plate. Cav.1 20% Cav.2 10% Cav.3 5% Cav.4 4% 如题，是指什么意思，这个百分比...华人论坛
在加拿大 Currently, we confront more noise issue in Taipan percussion production. Per investigation, we found there is difference between all 4 cavitiies of Mid-plate. Cav.1 20% Cav.2 10% Cav.3 5% Cav.4 4% 如题，是指什么意思，这个百分比...华人论坛