如果你只用一两个器械的话：一个哑铃，一个壶铃，一条跳绳，一个健身实心球，或者一条杆（用作引体向上）等，都可以作为选择。你还可以对自己加大挑战。
If you add just one or two pieces of equipment: a dumbbell, a kettlebell, a jump rope, a medicine ball, or a chinup bar, for example, you can increase the challenge even more.
如果你只用一两个器械的话：一个哑铃，一个壶铃，一条跳绳，一个健身实心球，或者一条杆等，都可以作为选择。 % 你还可以对自己加大挑战。
If you add just one or two pieces of equipment: a dumbbell, a kettlebell, a jumprope, a medicineball, or a chinup bar, for example, you can increase thechallenge even more.
这样的杆件在扭转时比实心截面的杆件柔得多。
Such members are much more flexible in torsion than those with a solid section.
将空心抽油杆与实心抽油杆进行了性能对比和实例计算，由此分析出空心抽油杆在螺杆系井中应用的优越性。
This paper compares the property of the hollow rod with that of the solid rod, and conducts case calculation.
根据将刀尖装配在刀杆上是通过用铜焊还是机械 卡装，刀尖可以是实心的或是带有中心通 孔的。
The tips can either be solid or with a central through hole, depending on whether brazing or mechanical clamping is employed for mounting the tip on the shank.
它的主要特征是包括实心体钉体，其上段为外螺纺杆及配合的固定加压螺帽；
The intramedullary nail is mainly characterized by including a solid nail body, the upper section of which is an external screw thread rod and a copulate fixedly pressure-adding screw cap;
明杆：这种阀门工作压力是125磅级和200psi冷水压力，明杆，管接头式阀盖，实心楔板，并按照美国阀门和管件制造商标准化协会MSS-SP80标准制造。
Rising Stem: Valves shall be Class 125 and 200 psi CWP, rising stem, union bonnet, solid wedge and manufactured in accordance with MSS-SP 80.
明杆：这种阀门工作压力是125磅级和200psi冷水压力，明杆，管接头式阀盖，实心楔板，并按照美国阀门和管件制造商标准化协会MSS-SP80标准制造。
Rising Stem: Valves shall be Class 125 and 200 psi CWP, rising stem, union bonnet, solid wedge and manufactured in accordance with MSS-SP 80.
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