according to the structure and operating principle of the jsl-30 drill rig, a drill parameter tester was developed especially for percussion drill.

1、

the quality and investment control of percussion drill hole grouting pile in karst area

岩溶地区冲孔灌注桩施工质量及投资控制

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2、

application of percussion drill and rotary drill in the construction of dock rock-socketed oblique piles

冲击钻机与回转钻机在码头嵌岩斜桩施工中的应用

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3、

and for the society as a whole, such an understanding means respect for culture as well as respect for freedom of religious belief.

对社会来说，讲宗教也是文化，则意味着对宗教信仰自由的尊重，也是对文化的尊重。

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4、

he was between scylla and charybdis, for his company had betrayed him.

他的同伴背叛了他，致使他腹背受敌。

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5、

effects of restricted root volume on growth and development of young peach trees

根域限制对幼年桃树生长发育的影响

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6、

stand on one's own legs.

靠自己的腿站着——自食其力。

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7、

hard-tack teacher and star candy

饼干老师星星糖

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8、

i know his temper, like hard tack as cold and hard, and often you angry, in fact, that's not my intention.

我知道自己的脾气，像压缩饼干一样又冷又硬，常常惹你生气，其实那并不是我的本意。

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9、

thisis a set of six rations consisting of a biscuit substitute, algae hard tack, algae crackers, coffee bag, coffee can, and water packet.

这是一套六包的口粮组成的饼乾代替，藻类硬钉，藻类饼乾，咖啡袋，咖啡可以和水包。

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10、

hydrocarbon migration direction in shengtuo region of dongying depression

东营凹陷胜坨地区油气运移方向研究

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11、

synthetical geochemical analysis of the oil and gas migration direction in the yanqi basin, xinjiang

新疆焉耆盆地油气运移方向综合地球化学分析

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12、

estimation of the oil and gas migration direction plays an important role in the forecast of beneficial exploration area.

油气运移方向的确定将对预测有利勘探区带起到至关重要的作用。

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13、

heavy compound ductile iron work roller manufacturing by centrifugal casting

离心复合大断面球墨铸铁轧辊的制造

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14、

the reasons are as complex as the iron work that graces a structure some 90 stories high.

其原因就像铁制品使得这座高一层罗高的建筑物具有美丽一样的复杂。

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15、

this former prison blends comfy beds, power showers and mood lighting with wrought-iron-work stairs and 3-inch-thick steel doors.

这家前身也是监狱的旅馆将舒适的大床，电热水器，以及气氛照明灯饰与锻铁楼梯，3英寸厚的钢门搭配在一起。

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16、

ltd. devotes to the reform and innovation of the wrought iron work.

佛山市南海御龙建材有限公司专心致力于锻造艺术的改革和创新。

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17、

fixed ralway equipment. fixing iron work for device of telecommunication and signalling overhead lines.

铁路固定设备.通讯和信号装置架空线路用器材.通讯和信号装置架空线路器材用铁件

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18、

control valve is one of important parts of water hydraulic rock drill machine, mass, structure and moving distance of valve core not only have influence on impact frequency of piston, but also on efficiency of impact component of rock drill machine.

配流阀是水压凿岩机的重要部件，阀芯的质量、结构、运动行程直接影响冲击活塞的频率，同时也影响凿岩机冲击机构的效率。

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19、

the drill bit wear in drilling of zro_2/ cepo_4 ceramics is more rapid than that of mild steel. the wear of drill bits increases with cutting rake angle. the cooling condition has remarkable impact on wear of drill bits.

与低碳钢比较，钻削ZrO2/CePO4陶瓷时硬质合金刀具的磨损速度增长较快，冷却条件对刀具磨损的影响显著。

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20、

design and research on a device preventing piston from idle impact for hydraulic rock drill

液压凿岩机活塞防空打装置的设计研究

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