螺纹

Some polypide surface membrane and food vacuole membrane showed multilayer thread-like change.

有些虫体表膜、食物泡膜呈现多膜样改变。

Methods To fixup internally by Luowenke s needle on 48 cases of displacement clavicle fracture.

方法将48例锁骨移位性骨折患者行切开复位克氏针内固定。

Good toughness and thermal cracking resistance.Used in the stands of prefinish rolling.Suitable for hot rolling thread steel.

具有优良韧性和抗热烈能力,适用于预精轧机架和热轧钢.

The mainstructure parameters of spirally grooved tube are diameter of tube, fin pitch,corrugation depth, wall thickness, spirally angle and spira.

旋槽(亦称)是其中个重要分支,它是种优良高效异形强化传热件。

A compression moulded part, which has nut inserts and flanges at both ends, is difficult to demould and set in the inserts.

塑件外侧两端各有突缘，且内嵌内嵌件，造成侧凹脱模和嵌件置入困难。

With certain shapes of or canula, elongated caps are made to cover both canula and threaded portion, and seal the canula at its top.

根据口和导不同形状，可以制造细长以覆导和部分，并在顶部封住导。

This paper researches into enhanced heat transfer of condensation of splitting gas of waste plastics and R113 on the general smooth tubes,the screw tubes and the aculei finned tubes.

本文研究制冷剂R113和废塑料制汽油过程中产生裂解气在水平光滑、与“犁刺”上冷凝强化传热。