Adequate and rigid support must be provided for long stemextension units.
对于长阀杆的延长装置，需要提供适当的和坚固的支撑座。
2
In the epicormic shoot stem which passed a growth season, the secondary laticifer differentiation of all the extension parts was accelerated by JA application.
在经过生长期的表皮茎上，施用茉莉酸能够促进各个伸长单位茎中次生乳管的分化。
3
The extension includes handwheel, non-rising stem, fittings and extensions to allow remote operation normally from above.