Because of the lower rock fragmentation efficiency and defective geometrical shape of chisel bit, Sweden has replaced chisel bit with taper connecting cross chisel bit and button bit since the mid seventies.
因一字形钎头破岩效率低和几何形状结构缺陷等问题，瑞典从７０年代中期就用锥体连接的十字和球齿钎头取代了一字形钎头。
The technology and design of one-step molding bore bit;
钎头一次成型工艺及模具设计
The results show that the microstructure of new type bainite steel bore bit is bainite ferrite (BF) and retained austenite and has good strength-toughness, wear resistance and has higher tempering resistance.
研究了新型贝氏体钢钎头材料的组织、力学性能及耐磨性能,结果表明,新型贝氏体钢钎头材料组织由贝氏体铁素体(BF)和奥氏体(AR)组成,具有良好的强韧性、耐磨性和较高的回火抗力。
The warm extrusion forming process and the die for bore bit were analyzed,It is fornd that the main reactor of die & in-die were fractured is forming pressure,structure & manufacture of the die and forming machine etc,and some related measures was tabed to improve using age of die.
通过对钎头温挤成型工艺过程和成型模具的分析 ,找出了凸模拉断、凹模开裂的主要原因 (成型压力、模具结构与制造、成形设备等 ) ,采取了相应的措施 ,提高了模具的使用寿命。
The paper discusses the surface boronization method and technology used in the experimental research of hard alloy bits It has a positive effect on the improvement of hard alloy bit body surface strength, wearability and service lif
对钎头胎体表面渗硼方法和工艺进行了实验研究，给出了有关工艺参数与方法。
Based on the analysis of air hammer bit,the present situation of research on mechanics,mechanism of bit and rock mutual impedance,statics,dynamics,hydraulics and the usage of computer simulation on bit are introduced.
根据国内外空气锤钎头资料,阐述了空气锤钎头在结构、空气锤钎头与岩石互作用、静力学、动力学、水力学以及计算机仿真技术应用等方面的研究现状。
Effect of rare earth cerium on the microstructure and tensile properties of brazed joint;
稀土Ce对Cu-Ag-P钎料钎焊接头组织和性能的影响
Residual stresses in brazed joints of ceramic-metal heater;
金属/陶瓷发热体直接钎焊接头的应力分析
Fracture microstructures and properties of Al-Li alloy brazed joints;
铝锂合金钎焊接头断口组织与性能
Now, we propose that chisel bit is renewed with more advantageous composite cutter bit gradually.
现在，我们建议用更具优势的复合片齿钎头逐步更新一字形钎头。
Bonding process of pure copper with amorphous Cu-P interlayer
非晶Cu-P钎料钎焊接头形成过程
Results indicated that, within certain range, the joint strength increased with the increase in weld thickness.
试验发现,在一定钎缝厚度范围内,随着钎缝厚度的增加,接头强度随之提高.
A pyramid of stones marked the spot.
那地点用一堆堆成金字塔形状的石头作了标记。
diagonal cut rock drill plus bits
对角十字形岩石钻头
cross-bladed chisel bit
十字刮刀楔形齿钻头
Phase Constitution of Soldering Seam and Mechanical Properties of Zn Matrix Filler Metal Soldering Magnesium Alloy AZ31B Joint
Zn基钎料钎焊镁合金AZ31B接头的钎缝物相及力学性能
One of the triangular characters of cuneiform writing.
楔形字楔形方字的三角形字之一
Research on the Properties and the Interfacial Reactions of Sn-Zn-Cu(Ni) Lead-free Solders;
Sn-Zn-Cu（Ni）无铅钎料及其钎焊接头界面反应研究
Effect of Cr on Property of Stainless Steel Joint Brazed with Series Ni-P Filler Metal
Cr对Ni-P系钎料钎焊不锈钢接头性能的影响
Microstructure and Mechanical Property of Joint by Amorphous Fillers
非晶镍基钎料钎焊接头性能及微观组织的研究
Microstructure of Soldering Joint of Rapidly Solidified Sn2.5Ag0.7Cu Solder Alloy
快速凝固态Sn2.5Ag0.7Cu钎料钎焊接头的显微组织
Study on Soldering Procedure and Joint Properties of Down Quenching SnAgCu Solder Alloy
急冷型SnAgCu系钎料合金钎焊工艺及接头性能研究
bit cutting angle
钻冠的尖度，钻头磨角，钎子头刃角
The men and women of the older generation formed a semicircle on the velvet carpet and kowtowed to one another.
克字辈的人由周氏领头，围成一个半圆形，在红毡上拜下去，互相道贺。
drill(ing) head
钻头; 主轴头; 钻床床头箱; 钻削动力头;钻头头部, 钎头
engraving miller for working metal numerically controlled
雕刻钎削机,用于金属加工,数字控制式
Carbide detachable bit for rock drilling
GB/T6480-1994凿岩用硬质合金钎头