There is a small network of rhombus in tokyo astronomical observatory.
东京天文台有一个小的菱形网。
At present, more integral fracturing design research focus on five - spot well network and nine - spot well network but little on rhombus anti - nine - spot well network.
目前，在整体压裂优化设计方面，人们对五点井网和反九点井网的研究较多，而对菱形反九点井网的研究较少。
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