由于该煤层厚度适中，选用掩护式液压支架。
Because this coal bed thickness is moderate, selects the shield type hydraulic pressure support.
用手摇切片机切片，可得到厚度适中的、可在显微镜下清楚观察的切片。
With rotary microtome, the proper thickness section can be obtained, and fibers in such section can be observed by light microcopy clearly.
故在泥质含量低、孔隙度小、油层厚度适中的地区，建议应用复合射孔技术。
So we suggest that combined perforating technique should be applied to the area where there is lower clay content, less porosity and moderate pay thickness.
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