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- Suitable for coring in medium hard formation with abrasiveness. Core recovery rate is high. 适用于带研磨性的中硬地层取芯，取芯收获率高。
- Suitable for coring in very hard formation with abrasiveness. Core recovery rate is high. 适用于高等硬度及研磨性的地层取芯，取芯收获率高。
- Medium parabolic profile and heavy cutter density provides high ROP in medium hard formation with medium compressive strength and small interbedded layers. 中等抛物线冠部和较密布齿使其在中等抗压强度的中硬地层以及薄夹层中能有良好的钻井速度.
- Because of the low penetration rate and loss of fault in block 32 and 53 in YEMEN,the problem of loss was successfully salved by adopting the foam drilling fluid and accelerated the drilling speed in hard formation by applying the air hammer. 也门 32区块和 5 3区块地层可钻性差、存在断层漏失 ,采用泡沫钻井液有效地解决了井漏问题 ,应用空气锤钻井加快了硬地层的钻进速度 ;
- Used for surfacing welding on middle hardness under normal temperature, such as axle. 常温硬度堆焊。如车轴等磨损面。
- KQC series of air hammers used in gas drilling can solve certain problems,such as lower ROP(Rate of Penetration) and well deviation,which occurred in mud drilling in above medium hard formation. 在油田气体钻井中使用KQC系列空气锤,解决了泥浆钻井在中硬以上地层中钻速慢、易井斜的难题。
- Helix angle45° to50°2 Flutes,3 Flutes,4 Flutes are applicable to process middle hardness steels, the stainless steel, Ti alloy. Its cutting efficiency is doubled. 螺旋角45°50°刃、刃、刃以适用于加工中硬度钢铁、锈钢、合金、合金等高硬度材料的高速切削，效果更佳。
- Pine is a soft wood and teak is a hard wood. 松木是软木，柚木是硬木。
- Thisseries of bit is suitable for drilling medium hard to hard formations with high compressive strength and medium abrasiveness. 适合在中硬至硬的高抗压强、中等研磨性的地层中使用。
- Largely for the inserts and buttons of percussion bits and tricone bits to ciut medium-hard,hard,hard,and very hard formations. 主要用作冲击钻、牙轮钻具的钎片、球齿、凿进中硬岩层、硬岩层以及紧硬岩层。
- Design of PDC bit for hard formation 硬地层PDC钻头设计的探讨
- Soft drinks are much in demand this hot weather. 这么热的天气，软饮料需求量很大。
- He was fawning on a damsel with soft words. 他正用甜言蜜语向一位女郞献殷勤。
- I'm sick of being piggy in the middle all the time. 我腻烦了总是夹在争吵双方的中间。
- He planted roses in the middle of the garden. 他在花园中间种上玫瑰。
- I've always had a real soft spot for him. 我一向对他挺有好感。
- Most animals are soft and fluffy when first born. 大多数动物刚出生时都很软，身上有绒毛。
- He admires the chivalry of knights in Middle Ages. 他很佩服中世纪武士的侠义精神。
- It has its roots deep in the Middle Ages. 它起源于遥远的中世纪。
- The mud was soft and our feet sank in. 泥很软，我们的脚都陷进去了。
