lightly pitching coal的意思|示意
美 / /
英 / /
轻抛煤
lightly pitching coal的网络常见释义
缓倾斜煤层 ... lightly mottled gray cast iron || 轻麻口灰铸铁 lightly pitching coal || 缓倾斜煤层 lightness || 亮度 ...