So every so often a sample is obtained with a coring bit.

因此時常要用取芯鉆頭取樣在线观看h一区。

Often a sample is obtained with a coring bit. It cuts a clean cylinder of rock, from

地質(zhì)學家需要知道鉆頭已以到達什么樣的巖層欧美另类性爱网，因此時常要用芯鉆頭取樣。

The gologist needs to know what rocks the drill has reached,so every so often a sample is obtained with a coring bit.

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The geologist needs to know what rocks the drill has reached, so every so often a sample is obtained with a coring bit.

地質(zhì)學家需要知道鉆頭已經(jīng)到達什么樣的巖層，因此時常要用取芯鉆頭取樣777琪琪午夜理论电影网在线。

The geologist needs toknow what rocks the drill has reached, so every so often a sampleis obtained with a coring bit.

地質(zhì)學家需要知道鉆頭已以到達什么樣的巖層黄色av一级片在线，因此時常要用芯鉆頭取樣。

coring bit：取心鉆頭

corgun 井壁取心器 | coring bit 取心鉆頭 | coring bullet 取心彈

coring bit：取芯鉆頭

geologist n. 地質(zhì)學家 | coring bit 取芯鉆頭 | cylinder n. 圓柱體

diamond coring bit：金鋼石取心鉆頭

牙輪取心鉆頭coring cone bit | 金鋼石取心鉆頭diamond coring bit | 硬質(zhì)合金取心鉆頭hard metal coring bit

hard metal coring bit：硬質(zhì)合金取心鉆頭

金鋼石取心鉆頭diamond coring bit | 硬質(zhì)合金取心鉆頭hard metal coring bit | 渦輪取心鉆頭turbo-core bit

coring bit,core bit：取心鉆頭

取心鉆進|core drilling | 取心鉆頭|"coring bit,core bit" | 取心鉆壓|coring weight