Cov laum tes tuav pob zeb tau qhia los ntawm Ingersoll-Rhiav. Hauv xyoo 1912. Raws li daim ntawv siv fais fab, nws tau muab faib ua plaub pawg: pneumatic, hydraulic, hluav taws xob thiab kev sib txuas nrog hluav taws xob tsav tsheb. Pneumatics yog cov feem ntau siv. Tes tuav pob zeb yog qhov tsim nyog rau drilling downward lossis inclin the qhov (ntiav qhov (ntiav Lub dob taub yog 19 ~ 42mm, thiab lub qhov tob tshaj plaws yog 5m, feem ntau tsawg dua 2.5m. Feem ntau siv pneumatic tuav pob zeb txoj kev muaj kev cuam tshuam ntawm 15 ~ 4530Mpa, ib lub siab ua haujlwm ntawm 1500 ~ 3900L / min, thiab qhov hnyav ntawm 7 ~ 30kg.
Lub sijhawm Post: Mar-31-2021
