这次省林科所和福州贮木场机修厂试制的造林挖穴机在我场进行性能试验,从十一月到十二月,连续使用了一百多小时,现将试验情况和我们的看法介绍于下。 1.挖穴机的工作效率高,成穴速度快,可节省大量劳力。如挖深度为40cm左右、直径30cm的穴,平均只须10～12秒。在土质较硬、小石块较多的林地,同样能破土钻进,平均 The provincial Forestry Branch and Fuzhou Yukimaki mechanic factory trial production of forest digging hole machine in my field performance test, from November to December, continuous use of more than one hundred hours, now the test and our The view is introduced below. 1. Dig hole machine high efficiency, speeding into holes, can save a lot of labor. Such as dug depth of about 40cm, 30cm diameter hole, the average only 10 to 12 seconds. In harder soil, more small stone forest, the same can be ground drilling, average